Value Collection MP39629 Hex Lock Nut 7/8-9 Grade 8

Product Description

The VALUE COLLECTION MP39629 is a 7/8-9 hex lock nut featuring a nylon insert locking style. It is manufactured from Grade 8 steel and left uncoated, making it suitable for high-strength fastening applications where vibration resistance is required. The nylon insert deforms around the mating thread to create a prevailing torque that resists loosening without the need for additional locking hardware. At 63/64 inches in height with a 1-1/4 inch width across flats, this nut conforms to UNC thread standards with a right-hand thread direction. Trade professionals, maintenance crews, and mechanical contractors rely on this type of fastener in structural and equipment assembly work.

This hex lock nut is used in mechanical, structural, and industrial assembly applications where a secure, vibration-resistant threaded connection is required. It is appropriate for use in heavy equipment, HVAC curb mounting, structural steel connections, and similar applications that demand Grade 8 fastener strength. The UNC thread form and inch measurement system make it compatible with standard American fastener tooling and hardware.

Key Features

• Nylon insert locking style resists loosening under vibration without additional locking hardware
• Grade 8 steel construction provides high tensile and proof load strength
• 7/8-9 UNC thread size with right-hand thread direction
• Uncoated finish suitable for applications where coating is applied after assembly or not required
• 63/64 inch height and 1-1/4 inch width across flats for standard wrench fitment

Compatibility

Designed as a standard UNC inch-series hex lock nut for use with 7/8-9 threaded fasteners and hardware in structural and mechanical assembly applications.

Installation Notes

Installation should be performed by qualified mechanical or maintenance personnel using a properly sized wrench or socket matched to the 1-1/4 inch width across flats. Verify mating bolt grade and thread engagement depth are appropriate for the load requirements before final torquing. De-energize or lock out any equipment before servicing fastened assemblies on powered systems. The nylon insert is single-use and should not be reinstalled once removed, as the locking torque will be reduced.