SSP Stainless Steel Fittings, Valves, Tube Fittings, Pipe Fittings SSP offers stainless steel tube fittings, valves, pipe fittings, hose fittings, tubing and weld fittings for instrumentation and industrial applications. Products are available in 316 SS, Alloy 400, Alloy C-276, Carbon Steel, and Brass. Fittings are available in sizes from 1/16 to 2 in.