Value Collection R50000021 Hex Lock Nut 5/16-18

Product Description

The VALUE COLLECTION R50000021 is a 5/16-18 UNC hex lock nut with a nylon insert locking mechanism, manufactured from Grade 2 steel with a zinc-plated finish. The nylon insert creates interference with the mating thread, resisting loosening caused by vibration and torque load without deforming the fastener itself. This nut measures 17/64 inches in height with a 1/2-inch width across the flats, and weighs approximately 0.008 pounds. It is suited for general mechanical and structural assembly applications across HVAC, plumbing, and light industrial work where a reliable, reusable locking fastener is required.

This hex lock nut is used in residential and commercial applications wherever a 5/16-18 UNC threaded fastener connection requires vibration resistance. Common installation scenarios include equipment panel assembly, bracket fastening, motor mounting, and other mechanical connections subject to intermittent vibration or dynamic loading. The right-hand thread direction follows standard UNC practice. The zinc plating provides basic corrosion protection suitable for indoor and sheltered outdoor environments.

Key Features

• Nylon insert locking style resists loosening under vibration without damaging mating threads
• 5/16-18 UNC thread size with right-hand thread direction
• Grade 2 steel construction with zinc-plated finish for basic corrosion resistance
• Compact profile: 17/64 inches high, 1/2 inch across flats
• Inch system of measurement, UNSPSC Code 31161716
• Does not meet military specifications — suitable for standard commercial use

Compatibility

Designed for use with any standard 5/16-18 UNC threaded bolt or stud in general mechanical and light structural assembly applications.

Installation Notes

Installation is performed with a standard wrench or nut driver sized for a 1/2-inch across-flats hex fastener. Always power down or de-energize equipment before working on fastened assemblies in electrical or mechanical enclosures. The nylon insert is a single-use locking feature — reuse of the nut after full removal is not recommended as the insert may lose clamping effectiveness. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific assembly.