1/2"-13 Polished 18-8 Stainless Steel Coarse Thread Acorn Cap Nuts

Diameter: 1/2"
Diameter 2: 55/64
Thickness: 1-3/32"
Material: Stainless Steel
Finish: Polished
Driver Type: 3/4" Wrench
Thread Size: 13 (Coarse)
Shape: High Crown Acorn
Hardness: 18-8
Type: Cap Nut

Box of 3.

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