Value Collection 52591377-100 Hex Lock Nut 1/2-13 Grade 5

Product Description

The VALUE COLLECTION 52591377-100 is a 1/2-13 hex lock nut with a nylon insert locking style, manufactured from Grade 5 steel with a zinc-plated finish. The nylon insert creates a prevailing-torque locking action that resists loosening from vibration and torque load without the need for additional locking hardware. The nut measures 19/32 inches in height with a 3/4-inch width across flats, following Unified National Coarse (UNC) thread standards with a right-hand thread direction. This fastener is installed by maintenance technicians, electricians, plumbers, HVAC mechanics, and general tradespeople across a wide range of mechanical assembly and structural fastening applications.

The 52591377-100 is suited for residential and commercial mechanical assemblies where vibration resistance is required. Typical applications include equipment mounting, structural brackets, pipe hangers, electrical enclosures, and HVAC equipment frames. The zinc-plated finish provides corrosion resistance for indoor and moderately exposed environments. This nut is sold individually but requires a minimum order of 50 units per order.

Key Features

• Nylon insert locking mechanism resists loosening under vibration and dynamic loads
• Grade 5 steel construction for reliable tensile and proof load performance
• Zinc-plated finish for corrosion resistance in standard service environments
• 1/2-13 UNC right-hand thread for compatibility with standard inch-series fasteners
• 19/32-inch height and 3/4-inch width across flats for use with standard hex wrenches and sockets

Compatibility

Designed for use with 1/2-13 UNC right-hand threaded bolts and studs in standard inch-series fastening applications.

Installation Notes

Install using a standard 3/4-inch hex socket or open-end wrench. Power down or de-energize any equipment before fastener replacement on live mechanical or electrical assemblies. Nylon insert lock nuts are single-use by design and should not be reused after removal, as the locking element degrades with each installation cycle. Follow applicable mechanical codes and equipment manufacturer torque specifications when assembling structural or load-bearing connections.