Description
Overview:
The Nut 3/8-16 Hex Nyloc, Genuine Briggs & Stratton OEM part number 5025394SM, is a steel hexagonal self-locking nut with a nylon insert designed to resist loosening under vibration. It uses a 3/8-16 UNC thread (approx. 9.5 mm major diameter with 16 threads per inch, ~1.59 mm pitch), making it suitable for many fastening points on Briggs & Stratton-powered equipment. Typical uses include securing pulleys, brackets, guards, engine covers and control linkages on lawn mowers, ride-on tractors, generators, pressure washers and other outdoor power machinery. Built for reliability and repeat maintenance work, this Genuine OEM fastener helps maintain consistent clamp load and reduces the risk of components backing off in service. Supplied as a direct replacement for the original hardware.
Key Features:
- Genuine Briggs & Stratton OEM fastener for assured fit and specification (Part No. 5025394SM)
- Thread: 3/8-16 UNC (approx. 9.5 mm diameter, ~1.59 mm pitch)
- Nyloc (nylon-insert) design provides reliable resistance to loosening from vibration
- Durable steel construction with a corrosion-resistant finish
- Hex head for use with standard spanners and sockets
- Direct replacement for the original nut on many Briggs & Stratton applications
- Helps maintain correct clamp load on pulleys, brackets, guards and covers
- Suitable for routine service tasks; replace if nylon insert is worn or heat-damaged
- Versatile across outdoor power equipment, from walk-behind mowers to ride-ons and small engines
- Genuine part ensures compatibility with factory torque settings and service procedures
Typical Applications:
Used where a self-locking 3/8-16 UNC nut is specified on Briggs & Stratton-powered equipment, including mower deck assemblies, idler pulleys, engine shrouds, cable and control brackets, guards and frame fixings on lawn mowers, garden tractors, tillers, chipper shredders and generators.
Also known as:
Nylon-insert lock nut, nylock nut, Nyloc hex nut, self-locking hex nut, 3/8-16 UNC locknut, 3/8 inch hex lock nut (≈9.5 mm), prevailing torque nut, vibration-resistant hex nut.
Alternate Part Numbers:
5025394SM
Product Specifications
| L&S Part No. | BS5025394SM |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Briggs & Stratton |
| OEM No. | B5025394SM |
| Unit of Sale | 1 |
| Fits Brands | Briggs & Stratton |
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