Manufacturer Part Number: 400-3639|Clamp Set Type|Step Block & ClampStud Thread Size|1/2-13Material|T-Slot Size (Inch)|11/16T-Slot Size (mm)|Step Block Width (mm)|T-Slot Nut Width (Decimal Inch)|T-Slot Nut Width (mm)|Includes|(24) Studs; (4) Coupling Nuts; (6) Flange Nuts; (6) Serrated End Clamps; (6) Step Blocks; (6) T-Slot NutsStep Block Widths (Decimal Inch)|1.0000Step Block Widths (Inch)|1Stud Lengths (Inch)|3; 4; 5; 6; 7; 8Stud Lengths (mm)|Maximum Capacitys in Set|Overall Length|T Slot Nut Width Inch(Fractional Inch)|1-1/8Number Of Pieces|52UNSPSC Code|27112100