Pin

The D-Type Wire Lock Pin is a heavy-duty, dependable quick-release fastener engineered to lock mechanical assemblies securely across agricultural, construction, towing, marine and general industrial scenarios. Consisting of a solid solid steel pin shaft matched with an integrated D-shaped spring wire retaining loop, this fastener delivers a simple, foolproof self-locking structure that stops unexpected pin pullout from vibration and shock, while enabling tool-free fast mounting and dismounting for routine maintenance.

Fabricated from premium carbon steel, spring steel or 304 stainless steel, the D-Type Wire Lock Pin boasts outstanding tensile strength, impact resistance and wear endurance for long-term repeated use. To deliver outstanding anti-rust performance against moisture, mud and corrosive outdoor working conditions, multiple surface treatment options are supplied, including standard electro zinc plating, yellow zinc plating and hot-dip galvanizing. These protective coatings effectively extend service lifespan and maintain stable locking performance under all heavy-duty outdoor operating environments.

The integrated D-form spring wire loop creates an automatic locking function right after pin insertion. The elastic wire loop tightly clamps against the pin end to eliminate vibration-induced loosening and upgrade overall equipment safety. This all-in-one integrated design removes the demand for separate cotter pins, R-clips or extra hand tools, greatly cutting assembly time, simplifying equipment upkeep and minimizing production downtime for operators. No loose small separate fastener parts to lose during operation.

D-Type Wire Lock Pins have extensive application coverage for trailer hitch couplers, tractor PTO shafts, farm implement linkages, ATV attachments, scaffolding components, lifting equipment, mechanical drawbars and all kinds of movable mechanical linkage assemblies. Their robust holding force and reusable construction make them the perfect locking component for equipment that requires frequent disassembly and reassembly while retaining a firm, safe connection at all times.

We offer full OEM and ODM custom manufacturing services, and accept customized production strictly based on client technical drawings, physical samples or custom specification requirements. Custom adjustable dimensions including pin diameter, effective grip length, wire loop thickness, alternative raw materials, exclusive surface finishes and personalized export packaging are all available to satisfy unique project demands. Custom private labels, laser marking and brand printing services are also supported for wholesalers, distributors, machinery factories and equipment manufacturers worldwide.

Every D-Type Wire Lock Pin is produced under rigorous standardized quality control protocols. Each finished fastener goes through comprehensive dimensional checking, locking elasticity testing and surface defect inspection before packaging and shipment, to guarantee precise dimensional tolerance, stable locking elasticity and consistent corrosion resistance for every batch of products.