Value Collection B52001631 Hex Lock Nut 1-3/8-12 Grade 8

Product Description

The VALUE COLLECTION B52001631 is a nylon insert hex lock nut designed for high-strength fastening applications where vibration resistance is required. Built to Grade 8 steel specifications, this nut delivers reliable clamping force in demanding mechanical assemblies. The nylon insert creates interference with the thread flanks, resisting loosening under dynamic loads without damaging the mating fastener. It carries a zinc yellow dichromate finish that provides corrosion resistance in general industrial and mechanical environments. The thread specification is 1-3/8-12 UNF, right-hand thread, making it compatible with fine-thread fastener systems. Maintenance technicians, mechanical assemblers, and industrial equipment technicians are the primary installers of this fastener.

This hex lock nut is suited for use in heavy equipment, industrial machinery, agricultural equipment, and structural assemblies that call for a 1-3/8-12 UNF fine-thread fastener with positive locking capability. The Grade 8 steel construction supports high clamp loads, and the nylon insert style allows for repeated disassembly and reassembly while maintaining effective locking action. Applications span drive shafts, suspension components, and any assembly subject to vibration or cyclic loading where thread loosening is a failure concern.

Key Features

• Grade 8 steel construction supports high tensile and proof load requirements
• Nylon insert locking style resists vibration-induced loosening without damaging bolt threads
• 1-3/8-12 UNF right-hand thread for compatibility with fine-thread fastener systems
• Zinc yellow dichromate finish provides corrosion resistance in general industrial use
• Height of 1-37/64 inches and width across flats of 2 inches for standard wrench fit
• Sold individually, suitable for single-unit replacement or low-volume assembly work

Compatibility

Designed as an OEM-style replacement or maintenance fastener for any assembly requiring a 1-3/8-12 UNF Grade 8 nylon insert hex lock nut with a 2-inch width across flats.

Installation Notes

Installation should be performed by a qualified mechanic or assembler familiar with high-strength fastener procedures. Torque the nut with a properly rated wrench to the specification called out in the equipment service manual for Grade 8 fasteners of this thread size. Ensure mating threads are clean and free of debris before installation. The nylon insert is a single-use locking element by design; replace the nut if it has been fully run down and removed, as repeated cycling reduces insert effectiveness.