-20, Bore Diameter 7/16 in, Head Outside Diameter 1 1/8 in, Head Width 0.Spherical Rod End, System of Measurement Inch, Ball Stud Center Length 1 3/4 in, Ball Stud Thread Length 7/8 in, Ball Stud Thread Size 7/16 In.562 in, Shank Thread Length 7/8 in, Shank Thread Size 7/16 In.