Hard-to-Find Fastener 014973242039 Fine Finished Hex Nuts, 1/2-20, Piece-50 Diameter: 1/2-Inch Material: Steel Finish: Zinc Driver Type: 3/4 Wrench Thread Type: 20 (Fine) Diameter: 1/2" Material: Steel Finish: Zinc Driver Type: 3/4 Wrench Thread Type: 20 (Fine)