Value Collection MP39630 Hex Lock Nut 1-8 Grade 8 Steel

Product Description

The VALUE COLLECTION MP39630 is a Grade 8 steel hex lock nut with a nylon insert, designed for high-strength fastening applications where vibration resistance is critical. The nylon insert deforms around the mating threads to create a prevailing torque lock, preventing loosening under dynamic loads without requiring secondary locking hardware. This nut uses a right-hand UNC thread in the 1-8 size, stands 1-3/64 inches high, and measures 1-7/16 inches across the flats. It arrives uncoated, making it suitable for applications where a specific field-applied coating or plating will be specified by the installer.

This hex lock nut is used in general industrial, mechanical, and structural assembly applications where Grade 8 fastener strength is required. Typical installations include heavy equipment, fabricated steel structures, and machinery frames where bolt joints are subject to vibration or cyclic loading. Licensed tradespeople and experienced industrial mechanics working in HVAC equipment assembly, mechanical rooms, and structural support installations will find this nut a direct-fit solution for 1-inch coarse-thread fastener systems.

Key Features

• Nylon insert locking style provides vibration-resistant prevailing torque without additional locking hardware
• Grade 8 steel construction delivers high tensile and proof load strength for demanding fastening applications
• Right-hand UNC thread at 1-8 size conforms to standard inch fastener systems
• Uncoated finish allows for field-applied coatings or direct use where coating is not required
• 1-7/16 inch width across flats fits standard heavy hex wrench and socket tooling

Compatibility

Designed as a standard-fitment replacement or new-installation hex lock nut for Grade 8, 1-inch coarse-thread UNC bolted assemblies in industrial and mechanical applications.

Installation Notes

Installation should be performed by qualified mechanics or tradespeople using a calibrated torque wrench sized for a 1-7/16 inch hex. Always de-energize and lock out equipment before accessing fastened assemblies on powered machinery. Nylon insert lock nuts are generally intended for single-use applications; inspect the insert for deformation before reusing on critical joints. Torque to the fastener assembly specification provided by the equipment manufacturer or applicable structural standard.