Diameter: 1/4"
Thickness: 21/32"
Material: Steel
Finish: Chrome
Driver Type: 7/16" Wrench
Thread Size: 20 (Coarse)
Shape: High Crown Acorn
Hardness: Grade 2 / A307
Type: Cap Nut

Box of 10.

A closed nut having a dome-like cap over the back, protruding part of the engaged screw or bolt. Also called an acorn nut.