ELBOW, CROSS, COUPLING, HALF COUPLING, CAP, PLUG, BUSHING, UNION, SWAGE NIPPLE, BULL PLUG, REDUCER INSERT, PIPE NIPPLE ETC. S ... , STREET ELBOW, TEE, BOSS, COUPLING, HALF COUPLING, CAP, PLUG, BUSHING, UNION, SWAGE NIPPLE, BULL PLUG, REDUCER INSERT, PIPE NIPPLE ETC.SOCKET ... STEEL: MARKED BY STAMPING.STAINLESS: MATERIAL,HEAT NO. B16(BELONG TO ANSI B16. 11 PRODUCT),PRESSURE AND SIZE.6. FINISH:GALVANIZED ...