Value Collection R52001686 Hex Lock Nut 5/16-18

Product Description

The VALUE COLLECTION R52001686 is a 5/16-18 UNC hex lock nut with a nylon insert locking mechanism, manufactured from Grade B steel with a zinc-plated finish for corrosion resistance. The nylon insert creates prevailing torque that resists loosening from vibration, shock, and rotation without requiring secondary locking hardware. Measuring 11/32 inches in height with a 1/2-inch width across flats, this fastener suits applications where reliable thread retention under dynamic load is required. Licensed electricians, HVAC technicians, plumbers, and mechanical contractors use nylon insert lock nuts in panel assemblies, equipment mounting, piping supports, and structural connections.

This hex lock nut is suited for light-to-medium duty fastening applications in residential and commercial mechanical systems. It is compatible with standard 5/16-18 UNC male-threaded fasteners and is commonly used in equipment mounting brackets, ductwork supports, electrical enclosures, pump assemblies, and general fabrication work where vibration resistance is needed. The zinc plating provides a degree of protection in mildly corrosive or outdoor-adjacent environments.

Key Features

• Nylon insert provides prevailing torque locking without additional hardware
• Grade B steel construction for light-to-medium duty load applications
• Zinc-plated finish offers mild corrosion resistance
• 5/16-18 UNC thread for compatibility with standard inch-series fasteners
• Right-hand thread direction follows standard installation convention
• Compact profile: 11/32 inches high, 1/2 inch across flats

Compatibility

Designed for use with 5/16-18 UNC right-hand threaded bolts and studs in standard inch-series fastening applications.

Installation Notes

Installation requires only a standard 1/2-inch wrench or socket. The nylon insert is a single-use locking element and should not be reused once the nut has been fully torqued and removed, as the insert loses prevailing torque effectiveness. Always confirm thread engagement and seating before applying final torque. Follow applicable mechanical codes and equipment manufacturer guidelines for fastener torque requirements.