Description
Overview:
These 3/8 inch UNC nylon insert locking nuts are hex nuts made from zinc‐plated steel with a durable nylon collar to provide a secure, vibration‐resistant hold. The nylon ring creates prevailing torque on the threads, helping joints stay tight under shock and movement on construction and garden machinery. The 3/8 inch UNC coarse thread has a major diameter of approximately 9.53 mm, suitable for standard UNC bolts and studs used on frames, guards, engine mounts and accessories. Zinc plating offers added resistance to rust in outdoor and site environments, and the hex form fits common spanners and sockets for straightforward installation. Supplied in a pack of 100 for workshop stock and larger jobs. Manufacturer Part Number (MPN): 903 0652.
Key Features:
- Size: 3/8 inch UNC (major diameter approx. 9.53 mm) for standard coarse-thread UNC bolts
- Nylon insert provides prevailing torque to resist loosening from vibration and shock
- Zinc‐plated steel body for improved corrosion resistance in outdoor and site conditions
- Hex profile for easy tightening with standard spanners or sockets
- Reliable clamp retention without additional locking washers in many assemblies
- Free‐spinning until the nylon engages for quick, controlled assembly
- Suitable for use on steel or stainless UNC fasteners where a reusable lock is needed
- Consistent quality for repeatable torque build-up and joint security
- Pack of 100 for maintenance teams, trade users and multi-fix projects
Typical Applications:
Used wherever a secure, vibration‐resistant nut is required on UNC fixings, including machinery frames, engine covers, guards, brackets, mounts and accessories. Common on mowers, compactors, generators, cement mixers, tillers, pressure washers and workshop fixtures. Ideal for repairs, rebuilds and routine maintenance in both professional and DIY settings.
Also known as:
Nyloc nuts, nylon insert nuts, self‐locking nuts, nylon lock nuts, prevailing‐torque nuts, elastic stop nuts, locking hex nuts, UNC locking nuts.
Product Specifications
| L&S Part No. | 903 0652 |
|---|---|
| Unit of Sale | Pack of 100 |
| Key Features | - 3/8 inch UNC thread, major diameter approx. 9.53 mm - Nylon insert resists loosening from vibration and shock - Zinc-plated steel for corrosion resistance - Hex profile fits standard spanners or sockets - Pack of 100 for larger jobs and stock |
Reviews
Ask a Question
Compatibility
Customers also bought
Related Products
-
![]()
UNC Steel Nuts, Zinc Plated, Size: 7/16". Pack of 100£12.54 £10.45 -
![]()
UNC Steel Nuts - Zinc Plated - Size: 5/8" - Pack of 50£22.12 £18.43
