Nylon Lock Nut

The Zinc Plated Nylon Insert Lock Nut (Hex Nyloc Nut) is a stable self-locking fastener engineered to stop bolt connections from loosening under continuous vibration, impact and alternating loads for automotive, mechanical, solar and general industrial assembly applications. It adopts a standard hexagonal carbon steel nut body matched with built-in high-performance PA66 nylon locking insert. After full tightening, the nylon ring forms tight interference fit with bolt threads, generating persistent friction restraint to avoid accidental loosening and disassembly during long-term equipment operation.

Constructed from premium Grade 8.8 carbon steel, the hex nut body delivers excellent tensile strength, hardness and compression resistance. The surface undergoes blue white electro zinc plating treatment, forming a uniform bright silver anti-corrosion zinc film that isolates air and moisture to delay oxidation, providing reliable rust protection for indoor and mild outdoor working environments. The internal PA66 nylon insert features outstanding elasticity, wear resistance and moderate temperature tolerance, maintaining stable locking friction without aging or permanent deformation in conventional operating temperature ranges.

The unique nylon ring interference locking structure offers superior anti-loosening performance against vibration. When threaded onto matching bolts, the internal threads squeeze the elastic nylon insert to create firm clamping friction on bolt shanks, effectively counteracting rotational loosening force caused by mechanical vibration, bumping and thermal expansion. Standard hexagonal outer profile supports quick tightening with spanners and sockets, compatible with both manual installation and automatic mass assembly lines. Precisely tapped internal threads fit standard metric bolts smoothly to deliver even, consistent clamping force.

Nylon insert lock nuts are widely used for automotive chassis and body assembly, heavy mechanical equipment connection, solar panel bracket installation, electrical control cabinet fixing, agricultural machinery linkage, and all mechanical fastening systems subjected to frequent vibration. Its combination of reliable vibration-proof self-locking function and economical anti-rust plating makes it an essential fastener for dynamic load assembly projects.

We supply full OEM and ODM custom manufacturing services, supporting tailor-made production according to customer technical drawings, physical samples and special specification demands. Custom thread sizes, nut height, nylon ring hardness, zinc coating thickness and customized export packaging are available to satisfy diverse project requirements. Private labeling, laser marking and custom brand printing services are also offered for hardware distributors, auto component factories, solar manufacturers and mechanical engineering contractors.

Each Zinc Plated Nylon Insert Lock Nut (Hex Nyloc Nut) is manufactured under strict high-strength fastener quality control standards. All finished nuts pass comprehensive dimensional inspection, thread precision test, nylon ring locking friction sampling test and surface coating uniformity check before shipment, ensuring precise thread tolerance, stable long-lasting self-locking performance and uniform qualified blue white zinc coating across every production batch.