Diameter: 3/8"
Thickness: 27/32"
Material: Steel
Finish: Chrome
Driver Type: 9/16" Wrench
Thread Size: 16 (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.