... test 3.Component Parts: Nut, Male Sub,Female Sub,Seal Ring Hammer Union- FIG 602Nominal pipe Size: 1'', 2'' 3'' 4''Pressure ... , butt-weld;Component Parts: Nut, Male Sub,Female Sub, Seal Ring;Sour Service Models to NACE MR-01-75.Recommended serviceManifold ... -to metal seal, and minimizes flow turbulence;Butt-weld available Hammer Union