Buy Nylon Lock Nuts Online in Australia
Nylon Lock Nuts
AIMS Industrial sells numerous nylon lock nut (nyloc nut) variants across metric, UNC, UNF and BSW thread standards in 304 stainless steel, 316 stainless steel, zinc-plated carbon steel, zinc-yellow and mechanically galvanised finishes.
Nylon lock nuts (also called nyloc nuts or nylon insert lock nuts) contain a nylon collar in the top of the nut that deforms around the bolt thread under torque, providing vibration-resistant locking without the need for thread-locking compound.
Unlike spring lock washers, nyloc nuts maintain their locking force even after repeated assembly and disassembly cycles.
Thread Standards Available
- Metric: Metric hex nyloc nuts in grades 6, 8 and 10, metric fine thread nyloc nuts (Grade 8), and metric nylon insert lock nuts in zinc-plated, zinc-yellow and zinc-yellow finish. Available in 304 SS and 316 SS for corrosion-resistant applications.
- UNC (Unified National Coarse): UNC hex nyloc nuts in Grade 5 and Grade 8 zinc-plated, UNC 304 SS, UNC 316 SS, UNC nyloc thin hex nuts. Also a UNC self-locking nut assortment refill and the Champion CA126 UNC/UNF assortment kit.
- UNF (Unified National Fine): UNF nyloc thin hex nuts (ASME B18.16) in zinc-plated, UNF nyloc Grade 5, UNF self-locking nut assortment refill and nylon insert lock nut assortment refill.
- BSW (British Standard Whitworth): BSW for older imperial-thread equipment and machinery still in service in Australia.
Finishes and Materials
- 304 Stainless Steel: Corrosion-resistant austenitic stainless for industrial, marine and food-grade applications. The nylon insert limits the continuous service temperature; not suitable for high-temperature applications.
- 316 Stainless Steel (A4): 316 SS (A4 marine grade) for high-chloride environments including coastal and offshore applications.
- Zinc-plated (Class 6, 8, 10): Standard carbon steel nyloc nuts with electroplated zinc for mild corrosion protection in general engineering and construction. Class 8 is the most common grade for general applications.
- Zinc-yellow passivate: Yellow chromate passivation over zinc plating, providing improved corrosion resistance compared to clear zinc. Commonly used in automotive and earthmoving applications.
- Mechanically galvanised: Heavier zinc coating than electroplating, suitable for outdoor, structural and construction applications.
Nut Profiles
- Standard hex nyloc: The most common profile. Hex flats suit standard sockets and spanners.
- Heavy hex nyloc: Nyloc heavy hex nut Class 8 zinc-plated — wider and thicker than standard hex, providing greater bearing area. Used in structural steel and high-load fastening applications.
- Thin hex nyloc: Nyloc thin hex nut Class 4 zinc-plated — reduced height for space-constrained assemblies.
Assortment Kits
- Champion CA270 self-locking nut metric assortment kit (270 pieces) — a comprehensive metric nyloc nut kit for workshops that carry stock across a range of sizes.
- Champion CA126 UNF/UNC nylon self-locking nut assortment kit — imperial thread nyloc nut kit in a single convenient case.
- Champion CA1836 self-locking nuts metric and imperial assortment kit (155 pieces) — a combined metric/imperial kit for workshops servicing both thread standards.
Expert Support: Need help buying the right product for your application? Contact our team for application-specific advice or request a quote.
Australian Business, Local Supply: AIMS Industrial has supplied Australian engineering and manufacturing businesses with fasteners since 1988.