... pipe fittings, coupling, A-8608, threaded connector DN15, DN20 and DN25, BSPP threaded, ISO228 parellel thread or NPT thread. ... and gas supply system Material optional: brass (HPb57-3A, HPb58-3A, HPb59-1A or customized brass rod, steel, ironProcess: cold cut, hot ... couplings, both brass forged and steel forged, copper fittings, full arange of selection and assorted models and series, please contact us ...