Conduit Strut Pipe Clamps 4” OD To 4 1/2” OD Rigid Mix Lot New/Used 9 Sets 277G. Here is a chance to get some left over clamps at a good price. You get what you see in the pictures. This Superstrut Conduit Strut Pipe Clamps set includes 9 mix lots of new and used units with a 4” OD to 4 1/2” OD diameter. The clamps are made of zinc-plated steel and have a gold color. They are designed to be track-mounted with a screw connection type and are suitable for rigid metal (RMC) conduit. The accessory type is conduit clamps and they offer a rigid flexibility. Made in the United States, these clamps are perfect for use in conduit fittings, tubing, wire, cable, and other electrical equipment and supplies.