Hard-to-Find Fastener 014973403393 Coarse Rod Coupling Nuts, 1/2-13, Piece-12 Diameter: 1/2" Length: 1-3/4 inch Material: Steel Finish: Zinc Driver Type: 11/16" Wrench Diameter 1: 1/2 inch Diameter 2: 11/16 Inch Length: 1-3/4 inch Material: Steel Finish: Zinc