Value Collection 7-N-37C Hex Lock Nut 3/8-16 Brass

Product Description

The VALUE COLLECTION 7-N-37C is a 3/8-16 hex lock nut with a nylon insert locking mechanism, manufactured from brass with a bright uncoated finish. The nylon insert compresses around the mating thread when torqued, creating prevailing-torque resistance without a secondary fastener or adhesive. This style of lock nut is used across plumbing, HVAC, and mechanical assembly applications where vibration resistance is needed and the assembly may require periodic disassembly. The 3/8-16 UNC thread designation follows Unified National Coarse standards. At 0.0195 pounds per unit, the nut ships in a minimum order quantity of 10 pieces.

This nut is suited for residential and light commercial mechanical systems, fluid handling assemblies, HVAC equipment mounting, and general fastening applications where brass construction is specified for corrosion resistance or to avoid galling on brass or copper mating hardware. Right-hand thread direction is standard. The nylon insert is rated for typical operating temperature ranges found in HVAC and plumbing service environments. Licensed mechanics, plumbers, and HVAC technicians commonly stock this size for field repairs and equipment installation.

Key Features

• Nylon insert provides prevailing-torque locking without thread adhesive
• Brass construction resists corrosion and is compatible with copper and brass mating hardware
• 3/8-16 UNC thread — widely used standard size across trade applications
• Bright uncoated finish — no plating that can chip or flake in wet environments
• Right-hand thread direction for standard installation
• Sold in multiples of 10 — practical for field stock and service kits

Compatibility

Designed as a standard 3/8-16 UNC hex lock nut for use with any 3/8-16 threaded fastener or stud where a nylon insert prevailing-torque nut is specified.

Installation Notes

Installation requires a standard 9/16-inch wrench or socket. Nylon insert lock nuts are designed for single-use or limited-reuse applications — the insert loses clamping effectiveness after repeated removal and reinstallation. Do not exceed the temperature rating of the nylon insert, and avoid using these nuts in applications with sustained elevated heat that could degrade the insert material. Shut down and de-energize any equipment before accessing fasteners on live mechanical or electrical assemblies.