Hard-to-Find Fastener 014973261894 Grade 8 Fine Hex Nuts, 5/8-18, Piece-10 Diameter: 5/8-Inch Material: Steel Finish: Yellow Zinc Driver Type: 15/16 Wrench Thread Type: 18 (Fine) Diameter: 5/8" Material: Steel Finish: Yellow Zinc Driver Type: 15/16 Wrench Thread Type: 18 (Fine)