For jacketed cable or wires protected by tubing. Both clamping halves float for maximum strain relief. For unjacketed cable or wires, use corresponding MS3420 bushing. To order clamp with bushing, add -1 to the 97-number. Two telescoping bushings are furnished with shells sizes 24 and larger. This cable clamp is die-cast zinc alloy and limited to the following plating variations: Std - olive drab/green chromate (621) - black zinc alloy (676) - bright nickel (624) - green zinc alloy (689) - electro less nickel.