Industrial Fasteners in Saudi Arabia

ASTM A325M Heavy Hexagon Bolt

ASTM A325M • ISO 7412 | EN 14399-4 | BS 4395 | IS 3757

ASTM A325M Heavy Hexagon Bolts are high-strength structural bolts used primarily in steel construction, bridges, and heavy machinery where secure and load-bearing connections are critical. These bolts conform to the ASTM A325M specification, which defines mechanical and chemical properties for medium-carbon steel quenched and tempered bolts. They feature a heavy hex head for improved wrench grip and torque application. Type 1 bolts are made from carbon or boron steel, while Type 3 bolts are weathering steel, providing enhanced corrosion resistance in outdoor environments.

ASTM A490M Heavy Hexagon Bolt Friction Grip Type

ASTM A490M • ISO 7412 | EN 14399-4 | BS 4395 (Part 1) | IS 3757

ASTM A490M Heavy Hexagon Bolts are high-strength, friction grip structural bolts used for critical steel-to-steel connections in bridges, buildings, and heavy industrial structures. Manufactured from quenched and tempered alloy steel, these bolts provide superior mechanical strength and fatigue resistance. Unlike ASTM A325M bolts, A490M bolts offer higher tensile and yield strength, making them ideal for pre-tensioned or slip-critical joints. Type 1 bolts are made from alloy steel, while Type 3 bolts are composed of weathering steel for enhanced corrosion resistance in outdoor environments.

DIN 186 T Head Bolt

DIN 186 • CSN 021343; PN 82418

DIN 186 T-Bolt (also known as a T-head bolt) is a high-strength fastener designed for use in T-slots of machine tables, jigs, and fixtures. Its unique T-shaped head allows it to be inserted directly into a T-slot and locked securely in place, providing a strong, adjustable, and reusable fastening point for clamping tools, components, and workpieces.

DIN 3570 U BOLT

DIN 3570 • DIN 3570

The DIN 3570 U-Bolt is a versatile, U-shaped fastener with two threaded ends, designed to secure pipes, tubes, and cylindrical objects to a surface or structure. Its curved body wraps around the object, while nuts on the threaded ends provide a tight, stable clamping force, making it ideal for plumbing, construction, automotive, and industrial applications.

DIN 603 Carriage Bolt/ Mushroom Head Bolt

DIN 603 • ISO 8677

Carriage bolts, also known as coach bolts, mushroom bolts, or round head square neck bolts, have a unique design with a square section beneath their rounded head. This self-locking feature allows for easy installation with a single tool, typically a spanner or wrench, making them suitable for various applications, including securing wooden beams or boards.

DIN 6921 Flange Bolt

DIN 6921 • DIN EN 1665

Metric DIN 6921 Hexagon Flange Bolts feature a washer-like flange under the head, which enhances load distribution when fastened to a substrate. These bolts come in serrated and non-serrated versions, making them versatile for various applications. These are typically made from high-strength steel or other materials, ensuring their durability and suitability for demanding structural and mechanical fastening tasks.

DIN 7380 Button Head Allen Bolt

DIN 7380 • ISO 7380

DIN 7380 Button Head Allen Bolt is a precision fastener with a low-profile, rounded head and an Allen socket drive. Designed for a flush and aesthetically pleasing finish, it is commonly used in applications where a streamlined appearance and secure fastening are essential, such as in automotive, electronics, and furniture assembly.

DIN 7984 Low Head Allen Bolt

DIN 7984 • UNI 9327

The DIN 7984 Low Head Allen Bolt is a specialized fastener known for its compact, low-profile hexagonal head design, ideal for applications where space is limited or a sleek appearance is desired. This bolt offers reliable and secure fastening solutions, making it a popular choice in industries like automotive, machinery, and assembly

DIN 7991 Allen CSK Bolt/Hexagon socket countersunk

DIN 7991 • ISO 10642

DIN 7991 Allen CSK (Countersunk) Bolt is a flat-head fastener with an internal hexagonal socket drive. These bolts are ideal for flush and clean installations and are commonly used in applications where a smooth and sleek surface is required, such as in furniture assembly or architectural structures.DIN 7991 Allen CSK Bolts are known for their high-strength and corrosion-resistant properties, making them a reliable choice for a wide range of industrial and engineering applications, ensuring both functionality and aesthetic appeal.

DIN 912 Allen Bolt / Socket Head Cap Screw

DIN 912 • ISO 4762 | UNI 5931 | BS 2470 | IS 2269 | JIS B 1176

DIN 912 Allen Bolts, also known as Socket Head Cap Screws, are precision-engineered fasteners designed for applications requiring high torque and strength in compact spaces. The hex socket drive allows for internal wrenching, ensuring a secure and clean assembly without protruding heads. They are widely used in mechanical assemblies, automotive components, and industrial machinery due to their strength, reliability, and neat appearance. Manufactured according to DIN and ISO standards, these bolts offer excellent mechanical properties and corrosion resistance depending on material and coating.

DIN 933 / 931 Hexagon Bolt

DIN 933 / 931 • ISO 4017 / ISO 4014 / IS 1364

DIN 933 (ISO 4017) fully threaded hex bolts and DIN 931 (ISO 4014) partially threaded hex bolts are designed for mechanical and structural applications where reliable fastening and precise engagement are required. DIN 933 bolts feature threads along the entire length, offering excellent grip for components requiring adjustment and alignment. DIN 931 bolts include an unthreaded shank for shear strength and are commonly used where a smooth bearing surface is needed beneath the head. Both variants are available in multiple grades and finishes to suit various industrial and environmental requirements.

DIN 939 1.25D Engineering Stud

DIN 939 • CSN 021176; PN 82131

The DIN 939 Engineering Stud is a high-strength, precision-engineered double-ended threaded stud designed for mechanical, construction, and industrial applications. Manufactured to the DIN 939 standard, these studs feature full threading on both ends with a plain unthreaded shank in the middle, providing reliable alignment, secure fastening, and ease of assembly for flanges, machinery parts, and structural components.

DIN 975 / 976-1 Threaded Rods

DIN 975 / DIN 976-1 • ISO 898-1 | ISO 3506-1 | BS 2693 | EN 10269 | IS 1367

DIN 975 and DIN 976-1 Threaded Rods are long, fully threaded bars designed for use in tensioning, fastening, and load distribution applications. They are manufactured according to DIN and ISO standards and are available in various materials, finishes, and strength grades. These rods are commonly used where high tensile strength and adjustability are required, such as in machinery assembly, construction, HVAC systems, and suspended installations. DIN 975 rods typically have standard metric threads, while DIN 976-1 covers different length and tolerance requirements for precision applications.

Finneck Bolt

These ASME B18 standard low carbon steel bolts with round heads and flat bearing surfaces are mainly employed to prevent the bolt from turning during nut tightening in thin plywood. They lock securely into steel or wood surfaces, aiding in bolt tightening, with common sizes including 1/2"x3/4" and M12x25/M12x35.

High Tensile Black Bolts Grade 10.9 & 8.8 | MS Black Threaded Bars & Hot-Dip Galvanized Threaded Rods – SRK Bolts UAE

SRK Bolts is a trusted manufacturer and supplier of high tensile fasteners and industrial fixing solutions across the UAE, GCC, and Middle East region. We specialize in premium quality Black Bolts Grade 10.9 & Grade 8.8, Mild Steel (MS) Black Threaded Bars, and Hot-Dip Galvanized (HDG) Threaded Rods, engineered for heavy-duty construction, oil & gas, infrastructure, and industrial applications. Our products are manufactured using advanced production technology and strict quality control systems to ensure high strength, durability, corrosion resistance, and precision threading. We supply ready stock as well as custom sizes to meet project-specific requirements.

ISO 13918 Welding Shear Studs and ceramic ferrules

ASTM A 108 • ASTM A 108

Shear Connector is one of the typical applications of arc stud welding technology, which is composed of shank, cheese head and welding end with aluminium arc flux. It is mainly used in steel-concrete structure buildings to provide the anti-shear force between the steel structure components and the concrete layer, which is combined into a stress whole.

Roofing Bolt

Roofing bolts feature a broad head and threaded shaft, complete with a square nut that secures during installation. Their wide head distributes weight effectively, making them ideal for affixing to thin materials without causing harm.Roofing bolts are commonly used in construction and roofing projects to securely fasten roofing materials, providing a strong and reliable connection that can withstand the elements and protect a building's interior from water damage.

Anco Lock Nut

An ANCO lock nut with a metal pin insert is a self-locking fastener designed to maintain a secure connection under vibration, torque fluctuations, and thermal cycling. Unlike nylon-insert lock nuts, this type uses a metallic pin or collar inside the nut threads, which creates prevailing torque and friction when threaded onto a bolt. This design ensures high-temperature performance, long-term durability, and resistance to deformation in extreme environments, making it ideal for automotive, aerospace, industrial machinery, and heavy equipment applications.

Cage Nut

Rack mount nut

A cage nut (also called a clip nut or captive nut) is a type of fastener consisting of a square nut encased in a spring steel cage. The cage allows the nut to clip onto thin or slotted metal panels, holding it securely in place while providing a threaded anchor for bolts or screws. Cage nuts are widely used in rack-mounted equipment, server cabinets, electrical enclosures, and sheet metal assemblies, where the panel thickness is insufficient to tap threads directly. They offer a reusable, vibration-resistant fastening solution for both light and medium-duty applications.

Clinch Nut

A clinch nut (also called a self-clinching nut) is a threaded fastener designed to be permanently anchored in thin sheet metal through cold-flow metal displacement. When pressed into a properly sized hole, the nut’s knurled, undercut, or serrated profile mechanically locks into the parent material, creating a strong, load-bearing internal thread that cannot rotate or loosen. Clinch nuts are used where thin metal sheets (typically 0.5–3 mm) cannot support tapped threads. They provide a strong, durable, and reusable metal thread point for bolts or screws. Common variants include: Standard clinch nuts (round or hex) Flush-head and low-profile clinch nuts Floating clinch nuts (for misalignment tolerance) Stainless steel self-clinching nuts

DIN 1587 Dome Cap Nut

DIN1587

A DIN 1587 dome cap nut—also called an acorn nut, crown nut, or cap nut—is a hex nut with a smooth domed, closed end on top. Its purpose is to cover and protect the exposed end of a bolt or threaded stud while also providing a clean, finished appearance. The closed dome design prevents the bolt threads from being exposed to moisture, dirt, and physical damage, making these nuts suitable for both functional and decorative applications. DIN 1587 nuts are commonly manufactured from steel, stainless steel (A2/A4), brass, or decorative alloys, often with finishes such as zinc-plating or polished stainless.

DIN 315 Wing Nut

DIN315

A DIN 315 Wing Nut is a type of fastener featuring two large “wings” or projections that allow it to be tightened or loosened by hand without tools. It is designed for applications that require frequent adjustments, quick assembly, and easy removal. Wing nuts are commonly manufactured from steel, stainless steel, brass, or plastic, and are widely used in machinery, furniture, electrical equipment, automotive, and DIY applications. The ergonomic shape provides excellent grip and enables fast manual tightening, making them ideal for temporary or adjustable connections.

DIN 439 Thin/Jam Nut

DIN 439 • JAM NUT

A DIN 439 Jam Nut is a thin hexagonal nut, typically used as a locking nut in combination with a standard hex nut. Its slim profile makes it ideal for applications where space is limited or where a locking mechanism is needed to prevent loosening due to vibration or motion. Jam nuts are commonly used in machinery, automotive components, threaded rod assemblies, and mechanical equipment where maintaining thread tension is critical.

DIN 6331 Hex Nut With Collar

DIN 6331 • ISO 4035 | ISO 7040 | UNI 5589 | BS 1768 | IS 1364

DIN 6331 Hex Nuts With Collar are precision-engineered fastening components featuring an integrated washer-like collar that distributes the load and prevents damage to clamped surfaces. The flange ensures secure tightening and resistance to loosening under vibration, making these nuts ideal for heavy-duty mechanical and structural assemblies. Manufactured from high-quality steel or stainless steel, these nuts meet DIN 6331 specifications for strength, thread accuracy, and durability. They are commonly used in automotive, machinery, and equipment installations where strong and stable clamping is required without the use of separate washers.

DIN 6334 Hexagon Coupling / Long Nut

DIN6334 • DIN6334

A DIN 6334 hexagon coupling nut, also known as a long nut, is a hexagonal-shaped fastener with internal threads along its entire length. It is primarily used to connect two externally threaded components, such as threaded rods or studs, extending the length of assemblies or joining threaded parts together. Coupling nuts are typically made from carbon steel, alloy steel, or stainless steel and are available in metric thread sizes. They are widely used in mechanical, construction, and structural applications where secure and adjustable threaded connections are required.

DIN 6923 Flange Nut

DIN6923 • ISO 4161; EU 1661;

DIN 6923 is a German standard for hexagon flange nuts that have an integrated, wide, and often serrated flange at the base. This flange distributes load over a larger area, eliminating the need for a separate washer and increasing stability, especially in high-vibration environments. The serrated version provides an extra locking action to prevent loosening

DIN 6926 – Self Locking Hexagon Flange Nut with Serration

DIN 6926 • ISO 4161 | UNI 9327 | EN 1661 | IS 1364

The DIN 6926 Self Locking Hexagon Flange Nut with Serration is a high-performance fastener designed for applications requiring vibration resistance and secure clamping. Its serrated flange bites into the mating surface, providing superior grip and reducing the chance of loosening. The flange base acts as a built-in washer, distributing pressure over a larger area to prevent damage to the joint surface. Manufactured from high-grade steel or stainless steel, DIN 6926 nuts ensure durability, mechanical strength, and corrosion resistance, even in demanding environments such as automotive engines or heavy machinery

DIN 7967 Pal Lock Nut

DIN7967

DIN 7967 describes a self-locking counter nut, commonly known as a PAL nut. These nuts are made from spring steel sheet and act as a lightweight locknut that prevents a primary nut from loosening under vibration, shock, or thermal expansion. A DIN 7967 counter nut is extremely thin, featuring formed locking tabs that create spring tension when threaded onto a bolt. When installed on top of a standard nut, it applies upward pressure and locks it securely in place—functioning similarly to a lock washer and nut combination, but in one compact component. They are widely used in space-sensitive and weight-sensitive assemblies where a full-size second nut or nyloc nut is not preferred.

DIN 917 – Hexagon Cap Nut

DIN 917 • ISO 4034 | UNI 5721 | EN ISO 4034 | IS 1364

The DIN 917 Hexagon Cap Nut (also known as a Dome Nut or Acorn Nut) features a hexagonal body with a closed dome-shaped end. This cap protects the exposed bolt threads while providing a clean, aesthetic finish to mechanical or architectural assemblies. Manufactured in steel, stainless steel, or brass, DIN 917 nuts are commonly used in automotive, machinery, furniture, and construction applications where both protection and appearance are important. They offer good resistance to mechanical stress, corrosion, and vibration depending on the chosen material and finish.

DIN 928 square weld nut

DIN928

A DIN 928 square weld nut is a metal nut with a square base designed to be welded onto a metal surface to provide a permanent threaded attachment point. Unlike standard nuts, the square base of the DIN 928 weld nut provides maximum stability during welding and prevents rotation during bolt installation. These weld nuts are typically made of carbon steel, alloy steel, or stainless steel, and are used extensively in sheet metal assemblies, automotive structures, industrial machinery, and construction equipment. They provide a secure and vibration-resistant threaded connection where tapping threads in the base material is impractical.

DIN 929 Weld Nut

DIN929 • DIN929

A DIN 929 Weld Nut is a special type of nut designed to be permanently welded onto a metal surface to provide a strong, threaded anchor point. These nuts are typically made from mild steel, stainless steel, or alloy steel, and feature projections or ribs on the base that allow for stable, strong weld connections. Unlike standard nuts that require a bolt to fasten components, a weld nut is affixed to the surface and acts as a permanent threaded insert, ideal for sheet metal assemblies, automotive bodies, and structural frames. DIN 929 weld nuts are widely used in manufacturing where reliable, vibration-resistant threaded connections are needed directly on metal parts without tapping threads on the workpiece itself.

DIN 934 Hexagon Nut

DIN934 • ISO 4032

A DIN 934 hex nut is a standard metric full (or “standard height”) hexagonal nut manufactured to the DIN 934 specification.While DIN 934 is the original German standard, it's very similar to ISO 4032, and many nuts compliant with ISO 4032 are interchangeable in practice.

DIN 935 - Hexagon slotted castle nuts

DIN935 • ISO 7035

The ISO 7035 / DIN 935 nut is commonly known as a castle nut, castellated nut, or slotted hex nut. It has a hexagonal body (six sides) with slots (slots or castellations) cut into one end. The slots are designed to allow a cotter pin (or safety wire) to be inserted through a hole in the mating bolt and through the nut, locking the nut in place. The standard defines dimensional tolerances, slot dimensions, height, thread sizes, etc., for these nuts.

DIN 980 Cone Lock Nut

DIN 980 • ISO 7042 All Metal Nut

DIN 980 refers to a standard for all-metal prevailing-torque lock nuts. These are often called “cone lock nuts,” “Stover lock nuts,” or “top-lock nuts.” They are hex nuts (six-sided) with a conical top (tapered) and a flat bearing surface on the bottom. The “locking” action comes from thread deformation or a metal insert that creates friction — resisting loosening under vibration. Equivalent / related standards: ISO 7042, CSN 021492, PN 82176

DIN 985 / 982 Self Locking Nut

DIN 985 / DIN 982 • ISO 10511 | ISO 7040 | ISO 7041 | UNI 7473 | BS 4929 | IS 1364

DIN 985 and DIN 982 Self Locking Nuts are precision-engineered fasteners featuring a non-metallic nylon insert that creates frictional resistance on the bolt threads, preventing loosening due to vibration or movement. DIN 985 nuts are a low-profile design, suitable for compact assemblies, whereas DIN 982 nuts have a taller body, offering increased thread engagement for higher loads. Manufactured to DIN and ISO standards, these nuts ensure secure, maintenance-free connections in both dynamic and static applications. They are available in various materials, coatings, and grades to suit environmental and strength requirements.

DIN 985 Prevailing Lock Nut

DIN985 • ISO 10511

A DIN 985 Nyloc nut is a hexagonal locknut that contains a non-metallic nylon insert at the top of the nut. When the nut is threaded onto a bolt or stud, the nylon ring deforms around the threads, providing frictional resistance that prevents the nut from loosening under vibration or dynamic loads. Also known as nylon insert locknut or self-locking nut. Designed according to the DIN 985 German standard. Available in various materials such as carbon steel, stainless steel (A2/A4), and brass, with finishes like zinc-plated or galvanized.

Shear Nut

Breakable Nut

A shear nut (also called a breakaway nut or security shear nut) is a specialized tamper-resistant fastener designed to provide a permanent, secure connection. It consists of a conventional hex head upper section and a lower conical nut body with internal threads. When the nut is tightened to a specified torque, the hex head shears off, leaving behind a smooth, tapered cone that cannot be gripped with standard tools. Shear nuts are used where security, tamper resistance, and permanent fastening are required, especially in public spaces, safety equipment, and high-value installations.

Speed Nut

A speed nut is a one-piece spring steel fastener. It combines the functions of a lock washer and a nut in one component. Rather than having traditional internal threads, speed nuts have prongs (usually two) that grip the screw or bolt as it is tightened. As you tighten the screw, the prongs are drawn inward, exerting pressure on the screw’s root thread, and the base (often arched) deforms elastically to produce a locking force. They are typically heat-treated to maintain their spring properties.

Spring Nut

A spring nut is a type of fastener used to secure components—often in metal framing systems, automotive assemblies, electrical strut channels, or sheet-metal applications. It combines a nut with a spring steel clip, allowing it to stay in place during assembly.

Teeth Nut

A teeth nut is a specialized fastener designed with multiple sharp teeth or serrated prongs around its flange. These teeth bite into wood, plastic, composite panels, or thin sheet material during installation, creating a secure, anti-rotation, high-pull-out anchoring point. The nut typically has: A flat or slightly curved flange Three or four hardened teeth extending downward A barrel with an internal machine thread (metric or imperial) When the nut is pressed or hammered into a pre-drilled hole, the teeth embed into the base material, preventing the nut from spinning and allowing a bolt or screw to be repeatedly tightened and loosened without damaging the surrounding material. Teeth nuts are widely used in woodworking, furniture assembly, sports walls (e.g., climbing holds), speaker cabinets, and jigs—anywhere a strong, durable threaded insert is needed in a soft material.

DIN 7349 Heavy Thick Washer

DIN7349 • Pack washer

The DIN 7349 thick washer is a heavy-duty, extra-thick flat washer specifically designed for use with grooved pins and other high-load mechanical fasteners. Compared to standard flat washers, DIN 7349 washers feature a larger outer diameter and significantly increased thickness, providing superior load distribution and shock-absorption performance. Manufactured from hardened steel or stainless steel, these thick washers are built to maintain structural integrity under extreme pressure, vibration, and repetitive impact loads. This makes DIN 7349 washers ideal for demanding industrial applications where standard washers would deform or fail.

DIN 125 Plain Washers

DIN125 • ISO 7089

The DIN 125 Washer Type A is a widely used component in various mechanical and construction applications. It is a flat washer that conforms to the German Industrial Standard (DIN) 125, Type A specifications, ensuring high quality and precision. These washers are typically made from materials like steel, stainless steel, or brass, and they serve as a crucial element for distributing loads and preventing surface damage in fastening systems. The Type A designation signifies that these washers have a larger outer diameter in comparison to Type B, providing greater surface coverage and load distribution. DIN 125 Washer Type A is a versatile and reliable choice for maintaining the integrity and stability of connections in numerous industries.

DIN 127 B Spring Lock Washer

DIN 127 • CSN 021741; UNI 1751

DIN 127 defines the standard for spring lock washers (also known as split lock washers) designed to prevent the loosening of threaded fasteners under vibration, shock, or dynamic loads. These washers feature a helical split design that provides elastic tension when compressed, increasing friction in the bolted joint and improving resistance to rotation.

DIN 137B Wave Spring Washer

DIN 137B • DIN 137B

Standard: DIN 137B is the German standard for “waved” (wavy) spring washers. A wave spring washer (also called wavy washer) per the DIN 137B standard — “Type B” means the washer has a wavy profile. Acts like a spring: when compressed, it provides a preload force (axial force) to maintain tension in a bolted joint. Helps compensate for tolerance variations, absorb vibration, and reduce loosening, especially in assemblies with limited axial space.

DIN 13912 Countersunk Cup Washer

DIN 13912 • NF E 27-619 — Actually a French standard for stamped cup washers; often used in place of a similar DIN standard

Countersunk Cup Washer | Heavy-Duty Finishing Washer for Countersunk Screws | Stainless Steel, Brass, Zinc | Furniture, Woodworking & Metalwork A countersunk cup washer (also known as a countersunk finishing washer) is a specially shaped washer designed to accommodate the tapered head of a countersunk screw. It provides a clean, decorative, and secure finish while distributing load over a larger surface area. These washers help prevent damage to the work surface, enhance fastening stability, and give a neat, professional appearance to installations.

DIN 434 Square Taper Washer

DIN 434 • CSN 021739; PN 82018; UNI 6598

DIN 434 Square Taper Washer: A square, wedge-shaped washer with a tapered underside (typically 8% taper) designed specifically for U-section (channel) steel beams. The taper lets the washer compensate for the sloped sidewalls of U-sections, ensuring that when you bolt through, the bolt head or nut seats flat, giving a secure connection. Usually they have two grooves on the top side, which are visual indicators for the taper on the underside.

DIN 436 Square Washer

CSN 021724; PN 82010; UNI 6596;

The DIN 436 Square Washer is a type of washer commonly used in mechanical and construction applications. It is designed to distribute the load of a threaded fastener, such as a bolt or screw, over a larger surface area to prevent damage to the material being fastened. These square washers are typically made from materials like steel, stainless steel, or brass, making them suitable for various environmental conditions. They feature a square shape with a hole in the center, which allows them to fit securely around the fastener. DIN 436 Square Washers conform to the German DIN 436 standard, ensuring their quality and compatibility with a wide range of industrial and construction projects.

DIN 471 External Retaining Ring

DIN 471 • External Circlip

A DIN 471 External Retaining Ring (also called External Circlip, External Snap Ring, or Shaft Circlip) is a semi-flexible, C-shaped ring designed to fit into a machined groove on the outside diameter of a shaft. Once installed, it clamps tightly onto the shaft and prevents axial movement of mounted components. These rings are made from hardened spring steel or stainless steel, providing high resilience, excellent clamping force, and long service life. DIN 471 defines the metric sizes and dimensional tolerances for external retaining rings.

DIN 472 Internal Retaining Ring

DIN 472 • Internal circlip

A DIN 472 Internal Retaining Ring (also known as an Internal Circlip or Internal Snap Ring) is a precision-engineered, C-shaped spring steel fastener designed to fit into a machined groove inside a cylindrical bore or housing. Once installed, the ring expands into the groove and provides a secure axial stop, preventing bearings, gears, sleeves, and other components from moving outward from the bore. Manufactured from hardened spring steel or corrosion-resistant stainless steel, DIN 472 internal retaining rings deliver strong radial tension, accurate fit, and long-lasting reliability in mechanical assemblies. The ring features two lug holes that allow easy installation and removal using internal circlip pliers.

DIN 5406 TAB WASHER

DIN 5406

The DIN 5406 washer is a locking tab washer (also called a shaft lock washer) standardized for use with slotted / round lock nuts (specifically DIN 981 locknuts). Its design includes an inner tab that engages into a keyway on the shaft, and outer locking tabs that are bent into the slots of the lock nut to prevent it from unscrewing. The tab washer provides a mechanical, positive-locking function: once installed and the tabs are bent, the nut cannot easily rotate off, even under vibration or reversal torque.

DIN 6795 Contact Washer

DIN 6795 • DIN 6795

Standard / Name: DIN 6795 — this defines a “grounding / contact washer.” Function: Primarily used to ensure electrical grounding (i.e., to provide a reliable electrical contact) in bolted connections. It also helps with vibration resistance / anti-loosening by providing extra grip.

DIN 6796 Belleville Conical Spring Washer

DIN6796

The DIN 6796 washer is a high-performance Belleville (conical) spring washer engineered to deliver strong, consistent preload in bolted joints. Designed for high-load and high-vibration environments, DIN 6796 washers provide a controlled spring action that maintains bolt tension, prevents loosening, and compensates for thermal expansion, settling, or relaxation of materials. These conical washers are widely used in critical applications such as mechanical assemblies, electrical connections, automotive components, railway systems, and heavy machinery. Made from high-strength spring steel or stainless steel, they offer exceptional durability, reliability, and resistance to fatigue.

DIN 6798 External Serrated Lock Washer

CSN 021745; UNI 8842 • CSN 021745; UNI 8842

A serrated lock washer to DIN 6798 is a washer with serrated / “tooth” edges (either inside or outside) that bite into the underside of a bolt head or nut and the mating surface when the fastener is tightened. The serrations increase friction and prevent the fastener from loosening under vibration or dynamic loads.

DIN 6799 Retaining washers for shafts

DIN 6799 • CSN 022929; PN 85112; UNI 7434

DIN 6799 is the German (DIN) standard for retaining washers used on shafts. These washers are sometimes called E-clips, external circlips, or retaining rings, because of their “E”-shape. They are designed to fit into a groove on a shaft and provide axial retention — i.e., they prevent components (like bearings, gears, pulleys) from sliding along the shaft. The washer is flexible/springy: when installed, it exerts spring tension that holds onto the groove base. Materials: common materials include carbon/spring steel and stainless steel (e.g., A2 / A4). Finishes/coatings: they may come plain or with surface treatments such as zinc plating, black oxide, hot-dip galvanizing, nickel, etc.

DIN 9021 Plain washer with outside diameter ≈ 3 x nominal thread diameter

DIN9021 • ISO 7093

DIN 9021 washers are large-series flat washers designed to provide a wider bearing surface under bolts, screws, and nuts. Compared to standard washers, DIN 9021 washers have a larger outer diameter (OD), making them ideal for distributing load over a bigger area, preventing pull-through, surface damage, or deformation—especially on softer materials like wood, aluminum, or plastics. Available in steel, stainless steel, brass, and various surface finishes.

DIN6798 Internal Serrated Lock Washer

DIN6798 • ISO 7089

DIN 6798 defines a family of serrated lock washers designed to improve fastener retention in applications subject to vibration or movement. The internal-tooth (Type I) version features serrations on the inner circumference that bite into the screw head or nut and the mating surface, increasing friction and preventing loosening.

DTI Washer

ASTM F959 / F959M • Standard: Commonly manufactured according to ASTM F959 / F959M for structural fasteners.

DTI washers, also known as Direct Tension Indicating washers, are specialized mechanical components designed to ensure proper tension in bolted connections. These washers are typically used in critical applications where maintaining the right bolt tension is essential for safety and performance. DTI washers feature unique markings that allow users to visually inspect and confirm that the correct tension has been applied to the fasteners. They are commonly used in industries such as construction, aerospace, and automotive, where precise bolt tension is crucial for structural integrity and reliability. DTI washers play a vital role in preventing under-tightening or over-tightening of fasteners, making them a valuable tool for quality assurance in various engineering applications.

Dowty Seal Washer

A bonded seal / Dowty washer is comprised of: A rigid metal outer ring (washer) that provides structural support and prevents over-compression of the elastomer. A vulcanised elastomeric (rubber) insert that is bonded to the inner diameter of the metal ring. Under compression, the elastomer forms the sealing contact with the mating surfaces. When used under a bolt head, nut or threaded port, the washer sits between the flat surface(s). Upon tightening the bolt/plug, the elastomer is compressed and forms a fluid-tight seal; the metal ring ensures that the compression is controlled and over-torque doesn’t crush the elastomer. Many bonded seals are “self-centring” (the insert helps locate the washer centrally) which helps in installation especially where access is limited

EPDM bonded sealing washer

Pack washer

SRK Bolts EPDM Bonded Sealing Washers Neoprene are designed to provide superior sealing capabilities in various industrial, automotive, and construction applications. Made from high-quality EPDM rubber and neoprene, these washers effectively prevent leaks by forming a tight seal around fasteners. They are resistant to water, oils, and chemicals, making them ideal for use in harsh environments. Choose SRK Bolt for durable and reliable sealing washers that enhance the performance and longevity of your assemblies. An EPDM bonded sealing washer is a dual-material sealing component consisting of a metal washer (usually steel or stainless steel) that has a vulcanized EPDM rubber layer bonded to its inner diameter. This combination provides excellent mechanical strength from the metal and superior sealing performance from the EPDM elastomer. EPDM bonded washers are designed to create a leak-proof, weather-proof seal in bolted or screwed connections. They prevent water, air, and dust leakage while resisting UV, ozone, and outdoor environmental conditions. These washers are widely used in roofing, plumbing, HVAC, solar mounting systems, water lines, and low-pressure applications.

Nord Wedge Lock Washer

Locking Principle: Nord-Lock washers use a wedge-locking technology, not friction, to secure bolted joints. Two washers are paired together. One side has cams and the other side has radial teeth. How It Works: When you tighten a bolt or nut with Nord-Lock washers, the teeth bite into the mating surfaces, and the cams create a wedge effect. Because the cam angle (α) is larger than the thread pitch (β), any attempt for the fastener to back out is blocked by the wedging action. Untightening: To loosen, the washers expand slightly more than the thread pitch, allowing the bolt or nut to rise and be removed.

O-Ring Rubber

O-Ring (Rubber) – Product Description A rubber O-ring is a circular elastomeric gasket designed to provide a reliable, leak-proof seal between two or more components. It is typically placed in a groove and compressed during assembly to prevent the passage of liquids or gases. Rubber O-rings are widely used across industrial, automotive, plumbing, and mechanical applications due to their flexibility, durability, and strong sealing performance. They are available in various materials such as NBR (Nitrile), EPDM, Viton (FKM), and Silicone to suit different temperature, chemical, and environmental requirements.

Schnorr Safety Washer

Allen Washer

The original SCHNORR® safety washers are in the form of a disc spring but with a trapezoidal cross-section and serrations on both sides. The outer diameter is matched to the head diameter of the pan head and socket head cap screws. SCHNORR® safety washers are available in two versions: The standard safety washer type “S” is available for screws of sizes M1.6 to M36 and of the property classes up to 8.8. For screws of property classes 8.8 and 10.9, higher pretension forces might be necessary. These are covered by our reinforced washers type “VS”.

Snap rings for bores

The SB Snap Ring for Bores is an internal retaining ring designed to be mounted in a machined internal groove inside a cylindrical housing or bore. When installed, the ring expands against the groove and forms a positive stop, locking components such as bearings, gears, and bushings inside the bore.

Teflon/ Nylon Washers

DIN 125A

DIN 125 Teflon/Nylon washers are flat, round washers manufactured to the DIN 125 standard (ISO 7089/7090). Instead of metal, these washers are made from engineering plastics such as Nylon (Polyamide PA6/PA66) or Teflon (PTFE). These washers provide excellent insulation, corrosion resistance, vibration damping, and lightweight performance, making them ideal for applications where metal washers are unsuitable.

DIN 7981 Pan Head Self Tapping Screw

DIN7981

A DIN 7981 screw is a self-tapping fastener with a pan-shaped head and cross-recess (Phillips or similar) drive. It cuts or forms its own mating thread when driven into materials such as metal, plastic, or thin wood, so in many cases no nut or pre-tapped hole is needed

DIN 7982 CSK Self Tapping Screw

DIN7982

DIN 7982 is a German industrial standard for self-tapping screws with a countersunk head and a cross-recess drive (typically Phillips or Pozi)

DIN 7985 Pan head Machine Screw

DIN 7985 • ISO 7045

A DIN 7985 screw is a metric machine screw with a pan head and cross (Phillips/Pozi) drive. The pan head has a flat bearing surface underneath and a rounded top, and the screw is fully threaded along the shank. These are standardized fasteners used to join parts via pre-tapped holes or with nuts

DIN 965 Counter Sunk Philips Machine Screw

DIN 965 • ISO 7046-1

DIN 965 Counter-Sunk Phillips Machine Screws are standardized metric machine screws with a flat, countersunk head and a Phillips (cross-recess) drive. They are engineered to sit flush with or below the surface of the material when installed into a pre-countersunk hole, providing a smooth, snag-free finish.

ISO 7380-2 Hexagon socket button head screw with flange

ISO 7380-2 • DIN 7380-2

A DIN 7380-2 / ISO 7380-2 flange button head screw (also called a button hex socket screw with flange) is a type of fastener that combines a low, rounded (button) head, a built-in flange beneath the head, and a hex socket drive. Mechanical Properties: Because of the head design (button + flange), the loadability is reduced relative to some other screw types. According to ISO 7380-2, the tensile load capacity in the head is assumed to be about 80% of that in the thread. Materials: Steel (Grade 10.9) for high strength. Stainless Steel (A2 / A4) for corrosion resistance.

Bow Shackle Type C

Bow Shackle Type C is a heavy-duty lifting and rigging component manufactured from high-strength forged steel. Its wide bow-shaped body provides greater flexibility and allows multiple sling legs or lifting connections to be accommodated. The shackle is designed for reliable load connection, lifting, rigging, and material-handling applications.

D Shackle – Heavy Duty Lifting & Rigging Shackle

DIN 82101 • DIN 82101, type A

A D Shackle is a strong and reliable rigging component designed for connecting, securing, lifting, and anchoring applications. Its D-shaped design provides a secure connection between lifting slings, ropes, chains, hooks, and other rigging equipment.

DIN 580 Lifting Eye Bolt – Heavy Duty Steel Lifting Ring Bolt

DIN 580

The DIN 580 Lifting Eye Bolt is a reliable lifting and securing component designed for applications where safe and convenient attachment points are required. Manufactured according to the DIN 580 standard, this eye bolt features a threaded shank and integrated lifting eye for connecting lifting equipment, chains, ropes, and other rigging accessories.

DIN 582 Lifting Eye Nut

DIN 582

DIN 582 lifting eye nuts are heavy-duty threaded lifting components designed for secure attachment and lifting applications. Manufactured according to the DIN 582 standard, these eye nuts feature a circular eye for connecting hooks, shackles, slings, cables, or other lifting equipment. They are commonly produced from high-strength steel and are available in different thread sizes and surface finishes to suit industrial, mechanical, construction, and material-handling requirements.

Heavy Duty Wire Rope Thimble

DIN 6899

The Heavy Duty Wire Rope Thimble is a durable cable fitting designed to protect wire rope loops from wear, crushing, abrasion, and deformation. Manufactured from strong galvanized steel, the thimble provides a smooth, reinforced eye for wire rope terminations and helps maintain the shape and integrity of the rope loop. It is commonly used with wire rope clips, shackles, hooks, turnbuckles, and other rigging hardware. The galvanized finish provides improved resistance to corrosion, making it suitable for a wide range of industrial, construction, marine, lifting, and outdoor applications.

Heavy-Duty Linch Pin (Lynch Pin)

DIN 11023

Heavy-Duty Linch Pin / Lynch Pin is a reliable mechanical fastening component designed to securely hold clevis pins, shafts, hitch pins, and other components in place. Made for demanding agricultural, industrial, automotive, and machinery applications, this locking pin provides quick installation and removal while helping prevent accidental disconnection. Its practical design makes it suitable for tractors, trailers, towing equipment, implements, machinery, and general mechanical assemblies where a secure and removable fastening solution is required.

Turnbuckle Hook and Eye

DIN 1480

Turnbuckle Hook and Eye is a heavy-duty adjustable tensioning fitting designed for applications that require controlled tightening, alignment, and tension adjustment. Featuring a hook and eye connection, this turnbuckle provides convenient installation and adjustment for wire ropes, cables, chains, fencing systems, shade structures, and general tensioning applications. Manufactured for durability and reliable performance, the turnbuckle allows users to increase or decrease tension by rotating the central body. Its adjustable design makes it suitable for applications where precise tension control and secure connections are required.

Turnbuckle Jaw & Jaw

Jaw & Jaw Turnbuckle is a heavy-duty wire rope tensioning fitting designed to provide controlled tension and adjustment in wire rope, cable, and rigging assemblies. Featuring jaw ends at both sides, it allows secure connection to compatible eye, hook, or clevis-type fittings. Manufactured for reliable performance, the turnbuckle can be adjusted to increase or reduce tension while maintaining a secure connection. Suitable for industrial, marine, construction, architectural, and general rigging applications, the Jaw & Jaw Turnbuckle is available in various sizes, thread configurations, and materials to meet different load and environmental requirements.

Wire Rope Clip DIN 741

DIN 741 • DIN 741

Wire Rope Clip DIN 741 is a durable steel wire rope clamp designed for securing wire rope ends and creating reliable rope loops. Manufactured to the DIN 741 design, it features a U-bolt, saddle, and nuts for mechanical fastening. The clip is available in various sizes to accommodate different wire rope diameters and is commonly used in construction, rigging, fencing, marine, agricultural, and general industrial applications. For improved corrosion resistance, galvanized wire rope clips are suitable for many outdoor and industrial environments. Correct installation and tightening are essential to achieve secure rope termination.

Swivel Eye and Eye

Eye & Eye Swivel / Double Eye Swivel

The Swivel Eye to Eye is a robust connecting and swiveling hardware component designed to join two eye-type attachment points while allowing rotational movement between them. Its double-eye construction helps reduce twisting and allows connected components to move more freely during operation. The pictured swivel features a stainless-steel finish, two oval eyes, central swivel construction, and bolted connections. It is suitable for applications where controlled rotation and secure connection are required.

Rivet Nut Without Collar

Flangeless Rivet Nuts Without Collar are precision-manufactured threaded inserts designed to provide strong, permanent internal threads in thin sheet metal, tubes, profiles, panels, and other materials where conventional nuts cannot be installed. Their collar-free construction provides a compact, low-profile fastening solution with minimal surface protrusion. The rivet nuts are manufactured from high-quality carbon steel, stainless steel, or aluminum using controlled forming and precision threading processes. The body is engineered to deform during installation, creating a secure mechanical grip on the reverse side of the workpiece while maintaining a reliable internal thread for bolt or screw assembly. Available in various metric and imperial thread sizes, body lengths, materials, and surface finishes, flangeless rivet nuts can be supplied according to application requirements and customer specifications. They are particularly suitable for applications requiring one-sided installation, limited access, flush fitting, and space-efficient fastening. These collar-free threaded inserts are widely used in automotive, electrical, electronics, HVAC, sheet-metal fabrication, machinery, furniture, and general industrial assembly applications.