Value Collection 1-THN-62F Hex Lock Nut 5/8-18 Unf

Product Description

The VALUE COLLECTION 1-THN-62F is a 5/8-18 UNF hex lock nut featuring an integrated nylon insert for vibration-resistant thread locking. Constructed from 18-8 stainless steel, this prevailing-torque nut resists corrosion and maintains clamping force in applications where standard hex nuts would back off over time. The nylon insert deforms against mating threads to create friction-based retention without damaging thread surfaces. The nut measures 15/16 inches across the flats and stands 25/64 inches high, with an uncoated finish suited for environments where coating adhesion or chemical compatibility is a concern. Mechanical contractors, plumbers, and equipment installers use this type of fastener across a wide range of structural and mechanical assemblies.

This hex lock nut is appropriate for residential and light commercial mechanical assemblies requiring secure, vibration-resistant fastening on 5/8-18 UNF threaded rod, bolts, or studs. Typical applications include HVAC equipment mounting, pump and motor bracket assemblies, piping support hardware, and general-duty mechanical fastening where a standard nut would require secondary locking provisions such as thread-locking compound or a secondary jam nut.

Key Features

• 5/8-18 UNF thread for fine-pitch engagement on standard threaded fasteners
• 18-8 stainless steel construction provides corrosion resistance in wet or outdoor environments
• Nylon insert delivers prevailing-torque retention without thread damage
• 15/16 inches width across flats fits standard SAE hex wrenches and sockets
• Uncoated finish eliminates coating compatibility concerns
• Sold individually for single-point replacement or low-volume service needs

Compatibility

Designed as a standard prevailing-torque replacement for 5/8-18 UNF hex lock nut applications in mechanical, HVAC, plumbing, and equipment support assemblies.

Installation Notes

Installation does not require specialized tools beyond a standard 15/16-inch hex wrench or socket. Power down or de-energize any associated equipment before accessing fastener locations in electrical or mechanical enclosures. The nylon insert is rated for single use in most structural applications — replace the nut rather than reusing it after removal. Follow applicable torque guidelines from the equipment manufacturer or relevant mechanical codes when specified.