Value Collection MP39664 Hex Lock Nut 7/16-20 Grade 8

Product Description

The VALUE COLLECTION MP39664 is a 7/16-20 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 the mating thread to resist loosening under vibration and torque without the need for adhesives or separate locking washers. At 15/32 inches high with 11/16 inches across the flats, this nut follows Unified National Fine (UNF) thread standards with a right-hand thread direction. It is suited for high-strength mechanical assemblies where fastener retention is critical.

This hex lock nut is used in industrial, mechanical, and trade applications requiring reliable thread locking in steel assemblies. The Grade 8 material rating makes it appropriate for high-load fastening scenarios in equipment maintenance, structural brackets, and machinery. Technicians and maintenance professionals working with UNF-threaded fastener systems will find this nut compatible with standard 7/16-20 bolts and studs.

Key Features

• Nylon insert locking style resists loosening from vibration without adhesives
• Grade 8 steel construction for high tensile strength applications
• Zinc yellow dichromate finish provides corrosion resistance
• 7/16-20 UNF right-hand thread for standard compatibility
• 15/32 inch height and 11/16 inch width across flats for standard hex tooling

Compatibility

Designed for use with 7/16-20 UNF threaded bolts and studs in Grade 8 or equivalent high-strength steel fastener assemblies.

Installation Notes

Installation requires a standard hex wrench or socket sized to 11/16 inches across the flats. Power down or de-energize any equipment before accessing fastener locations on mechanical assemblies. The nylon insert is single-use by design and should not be reused after removal, as the locking torque degrades with each installation cycle. Follow applicable mechanical and structural codes for torque requirements based on the specific assembly.