1/2″-13 Polished 18-8 Stainless Steel Coarse Thread Acorn Cap Nuts (3 pcs.)
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.