Description
Overview:
These UNF Nylon Insert Locking Nuts are 1/4 inch (6.35 mm) fine-thread fasteners designed to resist loosening under vibration. Made from zinc-plated steel with a silver finish, they offer good corrosion resistance for workshop, site, and outdoor use. Each nut features a nylon collar that creates a prevailing-torque lock on the mating thread, helping maintain clamp load over time. The thread is 1/4"-28 UNF (28 TPI, approximately 0.91 mm pitch) for a precise fit on fine-thread bolts and studs commonly found on machinery, plant, vehicles, and garden equipment. Supplied as a pack of 100 for efficient maintenance and stocking, these standard-height 'P' type hex nuts (Manufacturer Part Number 903 0621) are a practical choice for guards, brackets, covers, and general assemblies exposed to movement or cyclic loads.
Key Features:
- 1/4" UNF (6.35 mm) fine thread, 28 TPI (≈0.91 mm pitch) for accurate, secure fit
- 'P' type, standard-height nyloc design for reliable vibration resistance
- Zinc-plated steel for durability and enhanced corrosion resistance
- Hex form for easy tightening with standard spanners or sockets
- Consistent prevailing torque from the nylon insert for repeatable assembly
- Smooth, silver finish to aid installation and reduce thread pick-up
- Pack of 100 for bulk maintenance, repairs, and assembly work
- Suitable for bolts and studs with matching 1/4"-28 UNF threads
Typical Applications:
Used to secure fasteners on machinery and equipment subject to vibration, including engine covers, mower decks, compactors, generators, pumps, trailers, guards, brackets, and control panels. Suitable for construction plant, agricultural and garden machinery, automotive repairs, and general fabrication where a dependable, reusable locking nut is needed.
Also known as:
Nyloc nut, nylon insert nut, nylon lock nut, self-locking nut, prevailing torque locknut, elastic stop nut, stop nut, fine-thread lock nut, UNF nyloc.
Product Specifications
| L&S Part No. | 903 0621 |
|---|---|
| Unit of Sale | Pack of 100 |
| Size | 1/4" |
| Key Features | - 1/4" UNF, 28 TPI thread for precise fit - Nylon insert provides consistent prevailing torque - Zinc-plated steel for corrosion resistance - Hex form compatible with standard spanners - Pack of 100 for bulk use |
