Value Collection MP39640 Hex Lock Nut 9/16-18 Grade 8

Product Description

The VALUE COLLECTION MP39640 is a 9/16-18 UNF hex lock nut with a nylon insert locking style, manufactured from Grade 8 steel in an uncoated finish. The nylon insert creates friction against mating threads to resist loosening under vibration and dynamic loading without damaging the fastener threads. At 41/64 inches in height with a 7/8-inch width across flats, this nut follows standard UNF inch-series dimensioning. It is suited for mechanical assemblies, structural connections, and equipment mounting applications where thread security is required. Licensed tradespeople and maintenance technicians install these nuts using standard wrenches during assembly or field repair work.

This hex lock nut is used across a wide range of mechanical and structural applications requiring a reliable, reusable locking fastener. Typical scenarios include equipment frames, brackets, hydraulic component mounting, and general mechanical assemblies where vibration or cyclic loading is present. The right-hand thread direction and UNF thread form make it compatible with standard 9/16-18 bolts and studs used in both residential and commercial trade work.

Key Features

• Nylon insert locking style resists loosening under vibration without thread damage
• Grade 8 steel construction for high tensile strength in demanding applications
• 9/16-18 UNF right-hand thread for compatibility with standard inch-series fasteners
• Uncoated finish suitable for use with additional corrosion treatments if required
• 41/64-inch height and 7/8-inch width across flats match standard UNF hex nut dimensions

Compatibility

Designed as a standard UNF inch-series hex lock nut compatible with 9/16-18 right-hand threaded bolts and studs in mechanical and structural assemblies.

Installation Notes

Installation requires a standard open-end or box wrench sized to the 7/8-inch width across flats. Ensure mating bolt threads are clean and free of damage before assembly, as the nylon insert is designed for a single primary installation. Power down or de-energize any equipment before performing fastener work in electrical or HVAC assemblies. Torque to the appropriate specification for Grade 8 hardware as referenced in the relevant mechanical or structural code for the application.