Value Collection R52001596 Hex Lock Nut 5/8-18 Grade 8

Product Description

The VALUE COLLECTION R52001596 is a 5/8-18 UNF nylon insert hex lock nut manufactured from Grade 8 steel with an uncoated finish. The nylon insert creates interference with mating threads, providing resistance to loosening caused by vibration and torque load. Standing 3/4 inches high with a 15/16-inch width across flats, this fastener fits standard hex wrench and socket tooling. Right-hand thread direction conforms to UNF fastener standards. It is suited for mechanical assemblies, structural joints, and equipment installations where fastener retention under dynamic load is required.

This lock nut is used in industrial, commercial, and trade applications wherever a reliable locking fastener is needed on 5/8-18 UNF threaded rod, bolt, or stud. Typical applications include HVAC equipment mounting, structural brackets, pump assemblies, and general mechanical fabrication. The nylon insert style is widely used where disassembly and reassembly may be required, as the locking action does not permanently deform the mating threads.

Key Features

• Nylon insert locking style resists loosening under vibration without damaging mating threads
• Grade 8 steel construction provides high tensile strength for demanding mechanical joints
• 5/8-18 UNF right-hand thread for compatibility with standard unified fine-thread fasteners
• Uncoated finish suitable for use as-is or with additional field-applied coatings
• 3/4-inch height and 15/16-inch width across flats fit standard hex sockets and wrenches

Compatibility

Designed for use on 5/8-18 UNF threaded fasteners including bolts, studs, and threaded rod used in general mechanical and trade assembly applications.

Installation Notes

Installation is performed by hand-threading the nut onto the mating fastener and driving to final torque with a hex socket or open-end wrench. De-energize or lock out equipment before working on any mechanical assembly. The nylon insert is a single-use locking feature and may lose effectiveness if the nut is removed and reused multiple times. Follow applicable mechanical and structural codes for proper fastener torque specifications based on joint design.