1/4"-20 18-8 Stainless Steel Coarse Thread Acorn Cap Nuts

Diameter: 1/4″
Diameter 2: 1/2″
Thickness: 15/32″
Material: Stainless Steel
Driver Type: 7/16″ Wrench
Thread Size: 20 (Coarse)
Shape: Acorn
Hardness: 18-8
Type: Cap Nut
A closed nut having a dome-like cap over the back, protruding part of the engaged screw or bolt. Also called an acorn nut.