Value Collection 329070PR Hex Jam Nut 5/16-18 Unc Grade 2

Product Description

The VALUE COLLECTION 329070PR is a 5/16-18 UNC hex jam nut manufactured from Grade 2 steel with a bright, uncoated finish. Jam nuts are thin hex nuts used primarily as locknuts, threaded against a standard nut to resist loosening under vibration or dynamic loads. This nut measures 1/2 inch across the flats and 3/16 inch in height, making it a true jam nut profile rather than a full-height hex nut. The right-hand thread conforms to standard UNC fastener practice. Licensed tradespeople and maintenance technicians across mechanical, plumbing, electrical, and HVAC disciplines install these as locking elements in threaded assemblies wherever vibration resistance is required.

This jam nut is suited for light- to medium-duty fastening applications in residential and commercial mechanical systems. Its Grade 2 steel construction makes it appropriate for general-purpose use where high-tensile or hardened fasteners are not specified. Common applications include equipment mounting, conduit support hardware, pipe hangers, and panel fabrication. This part does not meet military specifications and is not intended for structural or high-stress fastener applications where Grade 5 or Grade 8 hardware is required.

Key Features

• 5/16-18 UNC right-hand thread for standard US fastener compatibility
• Jam nut profile at 3/16 inch height for use as a locknut in threaded assemblies
• 1/2 inch across flats, driven with standard 1/2-inch wrench or socket
• Grade 2 steel construction for general-purpose light- to medium-duty use
• Bright uncoated finish — suitable for dry or protected indoor environments

Compatibility

Designed as a general-purpose 5/16-18 UNC jam nut compatible with any standard right-hand threaded 5/16-18 stud, bolt, or threaded rod conforming to UNC fastener standards.

Installation Notes

Jam nuts are installed by threading the jam nut onto the fastener first, then threading the primary nut against it and torquing both in opposition to create a locking effect. Use a wrench on both the jam nut and the primary nut simultaneously when tightening to prevent one from spinning free. Uncoated steel is susceptible to corrosion in wet or outdoor environments — verify finish suitability for the installation location before use. No special tools beyond standard hand wrenches or sockets are required.