Description
Overview:
These 5/16 inch UNC nylon insert locking nuts are hexagonal steel fasteners with a durable zinc-plated finish for corrosion resistance. The nylon collar creates a prevailing torque on the thread, helping to stop joints loosening under vibration in construction and garden machinery. Sized 5/16 inch (approximately 7.94 mm) with a coarse UNC thread (5/16-18, about 1.41 mm pitch), they are intended for use with matching UNC bolts and set screws. The zinc plating offers protection in outdoor and workshop environments, while the hex form suits standard spanners and sockets for straightforward fitting. Supplied in a pack of 100 under MPN 903 0651, they are a practical choice for assembly, repair, and maintenance work on equipment such as mowers, compactors, generators, and similar machinery.
Key Features:
- Nylon insert provides a reliable self-locking action to resist loosening from shock and vibration
- Zinc-plated steel for improved corrosion resistance in damp or outdoor conditions
- 5/16 inch UNC thread (7.94 mm diameter, 18 TPI, approx. 1.41 mm pitch) for compatibility with standard UNC bolts
- Hex head design for easy installation with common spanners and sockets
- Suitable for repeated use within normal service limits where prevailing torque is maintained
- Pack of 100 for convenient stocking on site or in the workshop
- Clean threads and consistent nylon collars support repeatable clamping force
- Versatile across construction plant, agricultural and garden machinery assemblies
- Helps maintain joint integrity without additional locking washers in many applications
- Bright zinc finish offers a tidy, professional appearance on finished assemblies
Typical Applications:
Securing guards, brackets, panels, control boxes, engine covers, frames, and fixtures on equipment exposed to vibration. Common on lawn mowers, compactors, generators, tillers, cultivators, trailers, and general fabrication. Use where a 5/16 inch (7.94 mm) UNC fastener is specified and a prevailing-torque lock is required without resorting to liquid thread lockers.
Also known as:
Nyloc nuts, nylon lock nuts, elastic stop nuts, prevailing torque nuts, self-locking nuts, insert lock nuts, UNC lock nuts, hex nylon insert nuts, vibration-resistant nuts. These terms are often used interchangeably for nuts with a nylon collar that grips the mating thread to help prevent loosening during service.
Product Specifications
| L&S Part No. | 903 0651 |
|---|---|
| Unit of Sale | Pack of 100 |
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