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.