1/4"-28 x 1/2" Zinc Plated Steel Fine Thread Hex Jam Nuts (24 pcs.)

Diameter: 1/4"
Diameter 2: 1/2"
Thickness: 5/32"
Material: Steel
Finish: Zinc
Driver Type: 7/16" Wrench
Thread Size: 28 (Fine)
Shape: Jam Nut
Type: Jam Nut

Box of 24.

A jam nut is a low profile type of nut, typically half as tall as a standard nut. It is commonly used as a type of locknut, where it is "jammed" up against a standard nut to lock the two in place. It is also used in situations where a standard nut would not fit.