Value Collection R50000018 Hex Lock Nut 9/16-18

Product Description

The VALUE COLLECTION R50000018 is a 9/16-18 UNF hex lock nut with a nylon insert locking mechanism, manufactured from Grade 2 steel with a zinc-plated finish for corrosion resistance. The nylon insert deforms around the mating thread when the nut is torqued down, creating prevailing torque that resists vibration-induced loosening without the need for thread-locking compound or secondary fasteners. At 5/8 inches high and 7/8 inches across the flats, this nut fits standard 9/16-18 UNF threaded fasteners and is driven with a standard 7/8-inch wrench. It is suited for mechanical assembly, HVAC equipment mounting, plumbing fixture installation, and general trade fastening applications where vibration resistance is required.

This hex lock nut is appropriate for residential and light commercial applications across HVAC, plumbing, electrical, and general mechanical trades. The 9/16-18 UNF right-hand thread is a common size in equipment mounting and structural fastening scenarios. Grade 2 steel construction makes it suitable for standard-duty, non-critical fastening tasks. The zinc plating provides a measure of corrosion protection in moderately exposed environments. Sold individually, with a minimum order quantity of 50 units.

Key Features

• Nylon insert provides prevailing torque locking action to resist vibration loosening
• 9/16-18 UNF right-hand thread for compatibility with standard inch-series fasteners
• Grade 2 steel construction for standard-duty mechanical fastening
• Zinc-plated finish for moderate corrosion resistance
• 5/8 inch height and 7/8 inch width across flats for use with standard tooling
• Inch measurement system; does not meet military specifications

Compatibility

Designed as a standard replacement or stock fastener for any application requiring a 9/16-18 UNF right-hand thread hex lock nut with nylon insert locking.

Installation Notes

Install using a 7/8-inch open-end or box wrench; power-driven installation is not recommended as it can damage the nylon insert and compromise locking performance. Nylon insert lock nuts are typically single-use — once fully torqued and removed, the insert may not retain full locking effectiveness and should be replaced. Follow applicable mechanical codes and equipment manufacturer torque specifications for the assembly being fastened.