Midwest Fasteners Low-Profile Coarse Thread Zinc-Plated Steel Hex Jam Nut

Midwest Fasteners Low-Profile Coarse Thread Zinc-Plated Steel Hex Jam Nut

The Midwest Fasteners Hex Jam Nut is a low-profile, coarse thread hex nut machined from steel and finished in zinc plating for added corrosion resistance. Jam nuts are thinner than standard hex nuts, making them ideal for locking against a primary nut or adjusting a bolted connection without adding excess stack height. This hex jam nut is available across a full range of coarse thread sizes, from 1/4"-20 x 1/2" up to 3/4"-10 x 1-1/4", including 5/16"-18 x 9/16", 3/8"-16 x 5/8", 7/16"-14 x 25/32", 1/2"-13 x 27/32", 9/16"-12 x 1", and 5/8"-11 x 1-1/16", so you can match the exact thread and across-flats dimension your assembly requires. Every size shares the same silver zinc-plated steel construction and coarse thread pitch, and each hex jam nut is sold as an individual fastener for maintenance, fabrication, and general assembly work where a slim-profile locking nut is required.

Key Features

• Type: Hex jam nut with a thin, low-profile hex body for applications requiring a secondary locking nut or reduced thread engagement height.
• Material & Finish: Machined from steel and finished in zinc plating for corrosion resistance and a clean silver appearance suited to general-purpose fastening.
• Thread: Coarse thread pitch for quick, forgiving engagement with standard coarse-thread bolts, studs, and threaded rod.
• Size Range: Offered in 8 nut sizes from 1/4"-20 x 1/2" through 3/4"-10 x 1-1/4", so the correct thread and width across flats can be selected per job.
• Color: Silver zinc-plated finish, consistent across the hex jam nut body for a uniform appearance in visible assemblies.
• Package: Sold as an individual hex jam nut per selected size.

Technical Specifications

• Product Size: 1/4" - 3/4"

Typical Applications

• Locking a primary hex nut in place to prevent loosening under vibration.
• Adjusting the end position of threaded rod, bolts, or studs in fabrication and machine assembly.
• General maintenance and repair work requiring a thin-profile backup nut.
• Equipment and bracket assembly where stack height must be minimized.
• Jobsite and shop use alongside coarse-thread bolts and all-thread rod of matching size.

Why Midwest Fasteners?

Midwest Fasteners builds this hex jam nut line to a consistent steel construction and uniform zinc-plated finish across all eight available sizes, giving contractors, maintenance techs, and fabricators a reliable low-profile locking nut for coarse-thread assemblies. Consistent sizing and finish mean this jam nut performs predictably whether used as a secondary lock nut or a jam fitting against an adjustable connection, making it a dependable addition to any fastener inventory for professional and DIY work alike.