Value Collection 30638 Hex Lock Nut 1/2-13 Stainless Steel

Product Description

The VALUE COLLECTION 30638 is a 1/2-13 UNC hex lock nut with a nylon insert locking mechanism, manufactured from stainless steel with a bright, uncoated finish. The nylon insert compresses against mating thread flanks to resist vibration-induced loosening without damaging the threads. Standing 19/32 inches high with a 3/4-inch width across flats, this fastener suits applications where corrosion resistance and reliable locking torque must coexist. Installation requires a standard 3/4-inch hex wrench or socket. The right-hand thread direction follows standard UNC fastener convention.

This nut is appropriate for mechanical, plumbing, HVAC, and structural assemblies exposed to moisture, chemicals, or vibration. Stainless steel construction makes it well suited for outdoor installations, marine-adjacent environments, and corrosive service conditions where zinc-plated or plain steel fasteners would deteriorate. Trades including pipefitters, HVAC technicians, and maintenance mechanics commonly use nylon-insert lock nuts when a self-locking fastener is required without thread-locking compound.

Key Features

• Nylon insert provides vibration-resistant locking without thread damage
• 1/2-13 UNC right-hand thread for compatibility with standard inch-series fasteners
• Stainless steel construction resists corrosion in wet and chemically active environments
• Bright, uncoated finish — no coating thickness to account for in tight-tolerance applications
• Width across points of 0.837 inches for clearance planning in confined spaces

Compatibility

Designed for use with any 1/2-13 UNC inch-series threaded fastener following standard UNC thread form. Fits standard hex tooling sized for 3/4-inch width across flats.

Installation Notes

A licensed mechanic, pipefitter, or qualified maintenance technician should verify fastener grade and torque requirements for the specific assembly before installation. De-energize or depressurize the system being serviced before replacing fasteners in pressurized or energized assemblies. Use a calibrated torque wrench to achieve the required clamp load — the nylon insert adds prevailing torque that must be accounted for in final torque values. Do not reuse nylon-insert lock nuts in safety-critical joints, as the insert loses effectiveness after initial installation.