Value Collection 39651 Hex Lock Nut 1/4-20 Grade 8 Steel

Product Description

The VALUE COLLECTION 39651 is a 1/4-20 hex lock nut with a nylon insert locking style, manufactured from Grade 8 steel with a zinc yellow dichromate finish. The nylon insert compresses against mating threads to resist loosening under vibration and dynamic loads without damaging the fastener or mating component. Standing 5/16 inches high with a 7/16-inch width across flats, this nut follows a right-hand UNC thread standard. It is suited for structural and mechanical assemblies where vibration resistance and corrosion protection are both required.

This hex lock nut is used in a wide range of industrial, mechanical, and trade applications including HVAC equipment mounting, electrical enclosure assembly, plumbing fixture brackets, and general fabrication work. The zinc yellow dichromate coating provides a baseline level of corrosion resistance appropriate for indoor and light-duty outdoor installations. Technicians and fabricators working with 1/4-20 UNC fastener patterns will find this nut a direct fit for standard hex tooling.

Key Features

• Nylon insert locking style resists loosening under vibration without thread damage
• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance
• Right-hand UNC thread direction for compatibility with standard 1/4-20 fasteners
• 7/16-inch width across flats fits standard hex sockets and wrenches

Compatibility

Designed as a standard replacement or stock fastener for any assembly using 1/4-20 UNC right-hand threaded bolts or studs requiring a prevailing-torque nylon insert lock nut.

Installation Notes

Installation is performed with a standard 7/16-inch hex socket or open-end wrench. Nylon insert lock nuts are single-use by design — the insert deforms on first installation and should not be reused after removal. Always verify thread engagement depth meets the requirements of the assembly specification. Follow applicable mechanical codes and torque guidelines for the specific application and base material.