Value Collection 329470BR Hex Jam Nut 5/8-18 Unf Grade 2

Product Description

The VALUE COLLECTION 329470BR is a 5/8-18 UNF hex jam nut made from Grade 2 steel with a bright, uncoated finish. It features a right-hand thread and measures 15/16 inches across the flats with a height of 3/8 inches. Jam nuts are thin-profile fasteners used as locknuts to secure a primary nut in place or to position a component on a threaded rod or shaft. This nut is suited for general mechanical assemblies where a standard-height nut would interfere with clearances or where a secondary locking fastener is required. Installers across plumbing, HVAC, electrical, and general mechanical trades reach for this fastener type regularly.

This jam nut is appropriate for light- to medium-duty fastening applications in residential and commercial settings. Common uses include locking adjustment nuts on threaded rod assemblies, securing fittings at panel knockouts, and anchoring components on threaded standoffs. The 5/8-18 UNF fine thread pitch provides tighter thread engagement per inch compared to coarse thread, making it a preferred choice when vibration resistance or precise axial adjustment is needed. Sold individually with a minimum order quantity of 25 units.

Key Features

• Jam nut profile at 3/8 inches height allows use in tight clearance applications
• 5/8-18 UNF fine thread for tighter engagement and vibration resistance
• Grade 2 steel construction suitable for general-purpose fastening
• Bright uncoated finish — no coating buildup to affect thread fit
• Right-hand thread direction matches standard fastener conventions
• 15/16 inches across flats fits standard combination and open-end wrenches

Compatibility

Designed for use with any 5/8-18 UNF externally threaded fastener or threaded rod in general mechanical, HVAC, plumbing, and electrical assembly applications.

Installation Notes

Jam nuts are typically installed by a mechanic or trade technician using a standard open-end or combination wrench sized for 15/16 inches across flats. De-energize or shut down any equipment before working on fasteners in live mechanical or electrical assemblies. When using as a locknut, thread the jam nut against the primary nut and hold the primary nut stationary while torquing the jam nut into contact. Do not substitute jam nuts for full-height structural nuts in load-bearing connections where full nut engagement is required by code or specification.