Hex Jam (Thin) Nuts - (USS) Coarse Thread

Hex Jam (Thin) Nuts - (USS) Coarse Thread

Hex jam nuts, also called thin nuts, are about two-thirds the height of a standard hex nut. In USS coarse thread they are most often tightened against a full nut to lock it in place on threaded rod or a bolt. They are also used where space is tight. All sizes are zinc plated, from 1/4"-20 to 1-1/2"-6.

Specifications

• Style: hex jam (thin) nut, zinc plated steel
• Thread: USS coarse (UNC)
• Sizes: 1/4"-20 through 1"-8, plus 1-1/8"-7, 1-1/4"-7, 1-1/2"-6

Common Uses

• Locking a full nut on threaded rod
• Setting the height of leveling feet and adjusting screws
• Tight-clearance assemblies

FAQ

How do I lock a nut with a jam nut?
Thread the jam nut on, then the full nut. Hold the full nut with a wrench and tighten the jam nut against it so the two nuts bind on the threads.

Can a jam nut carry the full load of a bolt?
No. A jam nut is thinner, so it has less thread engagement. Use it as a locking or spacing nut, not as the main load-bearing nut.

Related: Fine thread version | All Hex Jam (Thin) Nuts | Thin (NTE) Nylon Insert Lock Nuts, Coarse

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