3/8"-16 Nickel Plated Steel Coarse Thread Acorn Cap Nuts (6 pcs.)Type: Cap Nuts
Driver Type: 9/16" Wrench
Thread Size: 16 (Coarse)
Type: Cap Nut
Box of 6.
A closed nut having a dome-like cap over the back, protruding part of the engaged screw or bolt. Also called an acorn nut.