Value Collection 1-THN-37C Hex Lock Nut 3/8-16 18-8 Ss

Product Description

The VALUE COLLECTION 1-THN-37C is a 3/8-16 UNC hex lock nut with a nylon insert locking mechanism, manufactured from 18-8 stainless steel with a bright, uncoated finish. The nylon insert creates interference with the mating thread to resist loosening caused by vibration or torque cycling without damaging the fastener. At 17/64 inches in height and 9/16 inches across the flats, this is a compact, standard-profile prevailing-torque nut. It is suited for mechanical assemblies, equipment fabrication, and general fastening applications where corrosion resistance and reliable locking are required. Trade installers in HVAC, plumbing, and electrical work use this style of nut when securing panels, brackets, and structural components subject to vibration.

This hex lock nut is appropriate for residential and light commercial applications requiring a UNC 3/8-16 threaded fastener. Its 18-8 stainless steel construction makes it a practical choice in environments with moisture exposure, such as mechanical rooms, rooftop equipment supports, pool equipment enclosures, and outdoor electrical panels. The nylon insert is suitable for standard operating temperatures encountered in typical HVAC and plumbing installations. Right-hand thread direction follows the standard convention for most threaded fastener assemblies in the trades.

Key Features

• Nylon insert provides prevailing-torque locking without thread damage
• 18-8 stainless steel construction resists corrosion in wet or humid environments
• 3/8-16 UNC right-hand thread — standard sizing for broad trade use
• Bright uncoated finish — no coating to flake or interfere with electrical grounding paths
• Width across flats of 9/16 inches accepts standard 9/16-inch wrenches and sockets

Compatibility

Designed as a standard UNC 3/8-16 prevailing-torque hex lock nut for general mechanical and trade fastening applications requiring an 18-8 stainless steel nylon insert nut.

Installation Notes

Installation requires a standard 9/16-inch wrench or socket. Power down or de-energize any equipment before accessing fastener locations on electrical enclosures or live panels. The nylon insert is single-use by design — once fully torqued and removed, the locking torque of the insert is reduced, and replacement with a new nut is recommended for critical joints. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific assembly.