Hexagon nuts ASME B18.2 ½ “ UNC A2-70 14 St. Hexagon nuts ASME B18.2 2 7/8 “ Steel 12 St. Stud bolts ASME B18.2 2 1/2 “ x 1 ½ “ UNC A2-70 12 St. Stud bolts ASME B18.2 7/8 “ x 2 ¼ “ UNC A2-70 12 St.