5/8" Accu-Clamp Collar One-Piece Type, Steel, Hardened & GroundSpecifications 1L010ACG UPC Code: 662786027185 Total Width (in.): 0. 813 Series: Solution Weight (lb.): 0. 29 Material: Steel Finish: BLACK OXIDE Bore Size (in.): 5 8 Screw Size: 10 32 x 5 8 Screw Type: SHCS Outside Diameter (in.): 2. 000 We are in the process of changing our Accu Clamp Family line to a balanced design with screw heads in opposing directions. Please contact our Sales Dept at 1 800 695 5551 or sales@staffordmfg. com with any questions