Value Collection R52001627 Hex Lock Nut 9/16-18 Grade 8

Product Description

The VALUE COLLECTION R52001627 is a 9/16-18 UNF hex lock nut with a nylon insert locking style, manufactured from Grade 8 steel with a zinc yellow dichromate finish. The nylon insert collar deforms around mating threads under torque, creating prevailing torque resistance that keeps the nut seated under vibration and dynamic loads. At 41/64 inches high with a 7/8-inch width across flats, this nut fits standard hex tooling. The Grade 8 steel construction provides high tensile strength suitable for demanding mechanical and structural fastening applications. Right-hand thread direction follows standard UNF convention.

This hex lock nut is suited for mechanical assemblies, structural connections, and equipment installations where vibration or cyclic loading could loosen standard fasteners. The 9/16-18 UNF thread is common in automotive, heavy equipment, and industrial machinery applications. The zinc yellow dichromate finish provides corrosion resistance in moderate-exposure environments. Installation is performed by mechanics, millwrights, equipment technicians, and maintenance trades using standard combination or box-end wrenches sized for a 7/8-inch across-flats hex profile.

Key Features

• Nylon insert locking style provides prevailing torque resistance against vibration-induced loosening
• Grade 8 steel construction for high tensile strength in demanding fastening applications
• 9/16-18 UNF right-hand thread per inch standard
• Zinc yellow dichromate finish for moderate corrosion resistance
• 41/64 inches height and 7/8 inches width across flats — fits standard hex tooling

Compatibility

Designed as a standard UNF 9/16-18 hex lock nut replacement for mechanical, structural, and equipment assemblies requiring a nylon insert prevailing-torque fastener in Grade 8 steel.

Installation Notes

Installation is performed by mechanics or maintenance technicians using a 7/8-inch wrench or socket. Ensure mating bolt threads are clean and free of damage before installation. Nylon insert lock nuts are generally considered single-use; inspect the nylon collar for deformation before reusing a removed nut. Torque to the value specified by the equipment manufacturer or applicable fastener standard for Grade 8 UNF hardware.