MACHINABLE FIXTURE CLAMPS       These clamps, with the machinable steel washers, provide more flexibility for holding round or unusual shaped parts. Parts can be held directly to the fixture plate surface or elevated for through-drilling. A special screw is provided with each package to hold the washer in the proper place during machining. The flat edge is the same location as our original fixture clamp. It can be used where a stronger clamping surface is required. - Low profile - Made of mild steel for machinability Part No.   A B C D E F G* H Torque (Ft./Lbs.) Max. Holding Force No. of Clamps per Pack* 10504 CAD 1/4 - 20 1/8 .040 .980 .250 .470 .250 .312 6.2 800 lbs 4 10506 CAD 3/8 - 16 3/16 .050 1.23 .350 .710 .275 .406 20.8 2000 lbs 4 10508 CAD 1/2 - 13 5/16 .100 1.48 .450 .900 .300 .500 65.0 4000 lbs 4 10510 CAD 5/8 - 11 3/8 .100 1.73 .550 1.125 .350 .593 100.0 6000 lbs 4 * G is the amount of machinable stock. + H is the distance to drill & tap hole from edge of workpiece to use flat face. ** Every package includes one machining screw.