3/16" x 0.786" Shank, 0.325" x 0.084" Countersunk Head, 0.125 to 0.331" Grip Range, Steel, Multi-Grip, Structural Break Stem, Rivet Rivet Type Multi-Grip, Structural Break Stem Shank Diameter 3/16 Inch Shank Length 0.786 Inch Head Type Countersunk Head...