Value Collection MP39651 Hex Lock Nut 1/4-20 Grade 8

Product Description

The VALUE COLLECTION MP39651 is a 1/4-20 hex lock nut with a nylon insert locking mechanism, manufactured from Grade 8 steel with a zinc yellow dichromate finish. The nylon insert creates interference with the mating thread, resisting loosening caused by vibration and dynamic loads. At 5/16 inches high with a 7/16-inch width across flats, this fastener follows Unified National Coarse (UNC) thread standards with a right-hand thread direction. It is suited for structural and mechanical assemblies where a reliable, reusable locking fastener is required under load.

This hex lock nut is used in a wide range of industrial, mechanical, and trade applications where vibration resistance is critical. Typical installations include HVAC equipment frames, pump and motor mounting hardware, electrical panel supports, and general structural assemblies. The zinc yellow dichromate finish provides a measure of corrosion resistance for use in mildly demanding environments. This fastener is sold individually with a minimum order quantity of 50 units.

Key Features

• Nylon insert locking style resists loosening under vibration and torque
• Grade 8 steel construction provides high tensile strength
• Zinc yellow dichromate finish offers corrosion resistance
• 1/4-20 UNC right-hand thread for broad compatibility with standard fastener systems
• Compact profile: 5/16 inches high, 7/16 inches across flats

Compatibility

Designed as a standard UNC 1/4-20 hex lock nut suitable for use with any matching 1/4-20 threaded fastener in Grade 8 steel applications.

Installation Notes

Install and remove using a standard 7/16-inch wrench or socket. Nylon insert lock nuts are intended for use on clean, undamaged threads to ensure the insert seats properly. The nylon insert may degrade at sustained elevated temperatures, so verify suitability for the thermal environment before installation. Always de-energize or lock out equipment before performing fastener work on energized assemblies.