3/8″-16 Polished 18-8 Stainless Steel Coarse Thread Acorn Cap Nuts (5 pcs.)
Diameter: 3/8″ Diameter 2: 5/8″ Thickness: 27/32″ Material: Stainless Steel Finish: Polished Driver Type: 9/16″ Wrench Thread Size: 16 (Coarse) Shape: High Crown Acorn Hardness: 18-8 Type: Cap Nut Box of 5. A closed nut having a dome-like cap over the back, protruding part of the engaged screw or bolt. Also called an acorn nut.