H-STRUT Cushion Clamps for Tubes are used to reduce noise due to shock and vibration and to eliminate metal to metal contact. Cushion Clamps are manufactured to fit into the standard openings of 1-5/8" channel to support runs of piping where desired, to secure the pipe in place. Our Cushion Clamps feature a unique shoulder stud which is securely fastened to one half of the clamp (available up to 1-3/8 clamp), which eliminates over-tightening and rotation. It has a nylon-insert nut assuring a positive lock.