Vibration loosens standard nuts, but JLHY's nylon insert lock nuts — Nyloc type — grip the bolt thread and refuse to let go. The nylon ring fused into the top of the nut is displaced by the bolt threads when assembled, creating a controlled interference fit that prevents rotation even under significant vibration and dynamic loading.

The nylon insert provides effective vibration-dampening and maintains locking properties through repeated assembly and disassembly cycles. One-piece construction means no separate components to lose or misassemble. Temperature range from -50°C to +120°C covers the majority of industrial applications.

Produced to DIN 986 / ISO 10511 in zinc-plated carbon steel, with stainless steel A2 and A4 versions for corrosive environments. The standard choice for automotive underbody, engine and transmission assemblies, railway equipment, and HVAC systems. Contact JLHY for nylon insert lock nuts in all standard sizes.