OEM Nylock Nuts (Nylon Insert Lock Nuts) Manufacturers & Supplier

Advanced Engineering of Nylock Nuts (Nylon Insert Lock Nuts)

A Nylock Nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is an innovative self-locking fastener. The design features a non-metallic (typically Nylon 66) collar insert located at the top of the nut, having an inner diameter slightly smaller than the major diameter of the mating screw thread.

When the mating male fastener is threaded into the lock nut, it forces its way through the unthreaded nylon collar. Rather than cutting the nylon, the mating thread elastically compresses the insert. This compression develops a radial frictional force around the threads, creating a high level of "prevailing torque." The resulting interference fit prevents the fastener from backing off even when subjected to severe, continuous transverse vibration (Junker testing parameters).

Our OEM Nylock Nuts are engineered to minimize thread wear, maintaining locking capability through multiple assembly cycles, while protecting structural joints in dynamic systems.

Precision Manufacturing & Sinsun Hardware Capabilities

Established in 2006, Sinsun Hardware has grown to become Northern China's leading manufacturer of high-end fasteners. Operating from a state-of-the-art 30,000 sqm integrated facility, our monthly output reaches over 3,000 tons. We manage over 20,000 SKUs, ensuring that our clients from automotive, construction, and power sectors have access to reliable components.

• Premium Raw Materials: We source steel directly from Ansteel and Xingtai Steel. We perform in-house spheroidizing annealing to guarantee uniform microstructure, reducing micro-cracks during cold heading.
• Advanced German & Taiwanese Machinery: Over 200 high-speed multi-station cold heading machines and thread rollers process materials with a tolerance threshold of ±0.02mm and surface roughness Ra ≤ 0.4µm.
• In-house Heat Treatment: Four continuous atmosphere-controlled heat treatment lines manage tempering and quenching processes, achieving uniform hardness between HRC 28-32 and tensile strengths exceeding 1000 MPa.
• Fully Automated Assembly & Inspection: Robotic systems insert the nylon locking collars with high precision, performing optical sorter inspections to ensure zero dimensional deviation.

China Supply Chain Resilience & Global Logistics Advantage

Sinsun Hardware operates a smart warehouse covering 12,000 sqm with a capacity of 18,000+ pallets. Supported by an advanced ERP system, we track raw material batches from initial wire drawing through production stages to ensure comprehensive traceability.

Our facility is situated close to major shipping hubs in Northern China, allowing us to manage high-volume shipments with efficient container loading (exceeding 50 TEUs per day). We maintain strong partnerships with major sea, rail, and air logistics providers, offering optimized shipping schedules to key markets including North America, Europe, the Middle East, Southeast Asia, South America, and Russia.

For high-volume distributors and OEM buyers, we offer flexible shipping options, localized customs clearance support, and structured supply agreements to secure your supply chain.