5/8"-18 x 1-1/16" 18-8 Stainless Steel Fine Thread Jam Nuts

Diameter: 5/8"
Diameter 2: 1-1/16"
Thickness: 3/8"
Material: Stainless Steel
Driver Type: 15/16" Wrench
Thread Size: 18 (Fine)
Shape: Jam Nut
Hardness: 18-8
Type: Jam Nut

Box of 4.

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.