Profile: Campbell Fittings, Inc. manufactures industrial hose fittings, couplings, clamps, ferrules and related tools & accessories for air, steam, gas, water, dry bulk, chemicals and petroleum applications. Our interlocking U-bolt clamps features 360° design wraps completely around hose for superior retention and bolts on up side allow easier tightening/re-tightening. Our viton seal ground joint coupling eliminates leaks with nut hand tightened.