HomeSERVICESDesign and Assembly Design and Assembly Custom fluid and pneumatic assemblies and fittings: Custom manifold and tubing assembly. Pipe and tube fittings: 303 Stainless, 1/8-27 NPT thread, Custom inner bore. Acetal tube manifold. 304 Stainless, 1/2-20 thread, Weld projection, Wire holes. Brass, 1/8-28 British pipe thread to 3/16″ tube barb. 303 Stainless, Custom 1/2″ hose barb, Cap and barb threaded.