7/16"-20 x 25/32" Zinc Plated Steel Fine Thread Hex Jam Nuts (8 pcs.)

Diameter: 7/16"
Diameter 2: 25/32"
Thickness: 1/4"
Material: Steel
Finish: Zinc
Driver Type: 11/16" Wrench
Thread Size: 20 (Fine)
Shape: Jam Nut
Type: Jam Nut

Box of 8.

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.