5/8"-18 Black Chrome Plated Steel Fine Thread Acorn Nuts (3 pcs.)

Diameter: 5/8"
Thickness: 1-3/8"
Material: Steel
Finish: Black Chrome
Driver Type: 15/16" Wrench
Thread Size: 18 (Fine)
Shape: Acorn
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.