Description
Overview:
These UNF Nylon Insert Locking Nuts in 5/16" (approximately 7.94 mm) are hexagonal steel nuts with a nylon insert that grips the mating thread to resist loosening from vibration. Made from zinc-plated steel, they offer reliable corrosion resistance for use on site, in the workshop, and outdoors. With a 5/16-24 UNF fine thread, they are well suited to assemblies that need stable clamp loads and a tidy, low-profile fixing. Commonly used across construction equipment, garden machinery, trailers, automotive repairs, generators and pumps, they provide a simple way to secure UNF bolts and studs. Supplied in a pack of 100 for efficient stocking and repeat maintenance tasks. Manufacturer Part Number (MPN): 903 0622 for easy identification.
Key Features:
- 5/16" (7.94 mm) UNF fine thread, 5/16-24, for precise, high-grip fastening
- Nylon insert provides prevailing torque to resist loosening under vibration
- Zinc-plated steel for dependable corrosion resistance and durability
- Hex form fits standard spanners and sockets for quick, simple installation
- Pack of 100 for bulk maintenance, site use, and spares management
- Suitable for indoor and outdoor service in demanding conditions
- Helps maintain consistent clamp load on machinery, vehicles, and fixtures
- Compatible with UNF bolts and studs used across many UK and US-made machines
- Clean, professional finish that resists galling compared to all-metal lock nuts
- Sensible reusability-inspect nylon insert and replace if grip reduces
- MPN 903 0622 aids stock control and reorder accuracy
Typical Applications:
Ideal for securing guards, brackets, covers, and mountings on construction plant, lawn tractors, mowers, compact tractors, compressors, generators, pumps, trailers, and automotive components. Often used where vibration is present, such as engine bays, chassis fixings, linkages, and rotating equipment housings, to keep joints tight without additional thread-locking compounds.
Also known as:
Self-locking nuts, prevailing torque nuts, elastic insert nuts, stop nuts, Nyloc nuts, nylon ring nuts, locknuts, UNF fine thread lock nuts, hex nylon lock nuts.
Product Specifications
| L&S Part No. | 903 0622 |
|---|---|
| Unit of Sale | Pack of 100 |
| Size | 5/16" |
| Key Features | - 5/16-24 UNF fine thread for precise fastening - Nylon insert resists loosening from vibration - Zinc-plated steel for corrosion resistance - Hex form fits standard spanners and sockets - Pack of 100 for bulk maintenance tasks |
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