1/2"-20 Chrome Plated Steel Fine Thread Flat Head Acorn Cap Nuts

Diameter: 1/2"
Thickness: 13/16"
Material: Steel
Finish: Chrome
Head Style: Flat (3/4" Wrench)
Thread Size: 20 (Fine)
Shape: Flat Head Acorn
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.