Automotive & Transportation

Precision Automotive Hardware — Trusted by VOLVO & Geely Auto

In automotive manufacturing, every connection matters. A single loose fastener can compromise vehicle safety, trigger costly warranty claims, or halt a production line. That's why leading car manufacturers including VOLVO and Geely Auto trust us to supply precision automotive hardware engineered for uncompromising reliability in vehicle assembly and production. Every component is manufactured to exacting tolerances, heat-treated for optimal strength, and surface-finished for long-term corrosion resistance — delivering the precision and dependability that automotive quality standards demand.

Complete Product Range — Engineered for Automotive Excellence:

Flange Bolts & Nuts — Vibration-Resistant Joints for Chassis & Drivetrain

· DIN 6921 Flange Bolts — Hex flange bolts with integrated washer face, property class 10.9, diameters M6 through M20, zinc or zinc-nickel plated. The broad bearing surface distributes clamping load and resists loosening under vibration — the preferred choice for chassis subframes, suspension components, engine mounts, and drivetrain assemblies.

· DIN 6923 Flange Nuts — Hex flange nuts with serrated or plain bearing face, property class 10, matched to DIN 6921 bolts. Used in high-vibration areas including exhaust systems, steering gear, and brake caliper mounting.

Hex Bolts — The Workhorse of Vehicle Assembly

· DIN 931 / DIN 933 Hex Head Bolts — Part-threaded (DIN 931) and full-threaded (DIN 933) hex bolts in property classes 8.8, 10.9, and 12.9, diameters M4 through M24. Available with zinc, zinc-nickel, or Geomet® coatings. Used throughout body-in-white assembly, frame construction, interior mounting, and general vehicle fastening — where strength, consistency, and torque control are essential.

Wheel Bolts & Studs — Safety-Critical Wheel Retention

· Wheel Bolts & Studs — M12×1.5 and M14×1.5 wheel bolts and wheel studs, heat-treated to property class 10.9, with zinc or Dacromet® corrosion protection. Engineered for precise thread engagement and consistent clamp load — securing wheels to hubs across passenger vehicles and ensuring safe, long-lasting wheel retention under real-world driving loads.

Self-Locking Nuts — Prevailing-Torque Security for Dynamic Components

· DIN 980 All-Metal Lock Nuts — All-metal prevailing-torque nuts, property class 8/10/12, providing reliable locking without nylon inserts — ideal for high-temperature engine bay and exhaust applications where heat would degrade polymer inserts.

· DIN 985 Nylon Insert Lock Nuts — Nylon-ring prevailing-torque nuts, property class 8, for general-purpose vibration resistance in body, interior, and chassis applications. Both types ensure joints stay tight under the constant vibration and dynamic loading of vehicle operation.

Socket Head Cap Screws — Precision Fastening for Engine & Transmission

· DIN 912 Socket Head Cap Screws — Hexagon socket head cap screws, property class 12.9, diameters M3 through M20, with black oxide or zinc plating. The low-profile head and high tensile strength make them essential for engine cylinder heads, transmission housings, timing systems, and tight-clearance precision assemblies where external hex fasteners cannot fit.

Stainless Steel Fasteners — Corrosion Protection for Exterior & Underbody

· A2-70 (304) & A4-80 (316) Stainless Fasteners — Full range of bolts, screws, nuts, and washers in austenitic stainless steel. A2-70 for general exterior and interior corrosion resistance; A4-80 (316) for enhanced chloride resistance in underbody, exhaust, and coastal-environment applications. Used for trim, body panels, fuel system, and brake line mounting where long-term corrosion protection is critical.

Washers — Load Distribution & Vibration Damping

· DIN 125 Flat Washers — Standard flat washers, zinc-plated or stainless, diameters M3 through M36, distributing clamping load and protecting mating surfaces across all vehicle assembly areas.

· DIN 127 Spring Lock Washers — Split-type helical spring washers providing anti-vibration locking for general-purpose fastening in interior, body, and chassis applications.

· DIN 6796 Conical Spring Washers (Belleville) — Conical spring washers for high-clamp-load, vibration-prone joints including engine mounts, suspension bushings, and brake system mounting — maintaining preload under thermal expansion and dynamic loading.

Studs & Threaded Rod — Permanent High-Strength Connections

· DIN 939 Double-End Studs — Equal-length double-end studs, property class 8.8/10.9, for cylinder head, exhaust manifold, and intake manifold mounting where repeated disassembly would damage tapped holes.

· DIN 976 Threaded Rod — Full-threaded rod, carbon steel or stainless, cut to length for custom fastening solutions in jig, fixture, and structural applications.

Self-Tapping & Self-Drilling Screws — Fastening Thin-Gauge & Sheet Metal

· DIN 7981 / DIN 7982 Self-Tapping Screws — Pan head and countersunk self-tapping screws, zinc-plated or stainless, for interior trim, dashboard, bumper covers, and thin-gauge sheet metal fastening where pre-tapping is impractical.

· Self-Drilling Screws (DIN 7504) — Drill-point screws with integrated drilling tip, for fastening sheet metal, HVAC ducting, and body panels without pre-drilling — accelerating assembly line throughput.

Rivets — Permanent, High-Integrity Connections

· Blind Rivets (Pop Rivets) — Aluminum, steel, or stainless steel blind rivets for body panels, interior trim, and inaccessible-side fastening — fast, consistent, and ideal for high-volume assembly.

· Huck® / Ring-Groove Lock Bolts — High-strength structural rivets for chassis frame, truck body, and crash-critical structural joints — providing vibration-proof, permanent clamping exceeding conventional bolts.

Pins — Precision Location & Retention

· DIN 7 Parallel Pins & DIN 1 Taper Pins — Hardened steel precision pins for accurate component location in engines, transmissions, and jigs — ensuring repeatable alignment during assembly and service.

· DIN 94 Split Cotter Pins — Zinc-plated cotter pins for securing castle nuts and clevis pins on steering, suspension, and brake components — a low-cost, fail-safe locking method.

· DIN 1481 Spring Pins (Roll Pins) — Slotted spring-type pins for hinge, shaft, and lightweight retention in door mechanisms, seats, and interior assemblies.

Retaining Rings — Secure Shaft & Bearing Retention

· DIN 471 External Retaining Rings — Circlips for external shaft mounting, securing bearings, gears, and pulleys on shafts.

· DIN 472 Internal Retaining Rings — Circlips for internal bore mounting, retaining bearings and components within housings. Both in spring steel with phosphate or zinc finish, providing reliable, space-efficient axial retention in transmissions, engines, steering systems, and wheel hubs.

Lifting & Rigging Hardware — Supporting the Production Line

· G209 / G2130 Shackles — Screw-pin and bolt-type alloy steel shackles, WLL 0.5T–150T, for engine, transmission, and body-in-white lifting on the assembly line.

· DIN 580 Lifting Eyes — Collared eye bolts providing certified lift points on heavy tooling, dies, and production equipment.

· Wire Rope Slings & G80 Chain Slings — Galvanized wire rope slings (6×19/6×37) and Grade 80 alloy chain slings in single- to quadruple-leg configurations, for safe handling of powertrain assemblies, stamping dies, and vehicle bodies throughout the plant.

Engineered for Automotive Quality — Certified for the Production Line

All automotive hardware is manufactured under IATF 16949 automotive quality management systems (in addition to ISO 9001), with full material traceability, batch-level dimensional inspection, salt-spray corrosion testing, and torque-tension verification. From the assembly line to the finished vehicle, our precision fasteners ensure every joint holds — the reliability that VOLVO, Geely Auto, and other leading car manufacturers count on, vehicle after vehicle.