hex nipple/ precision tube fitting: male thread in NPT,BSP and 1/8"-2", CE certificated hex nipple/ precision tube fitting: male thread in NPT,BSP and 1/8"-2", material: SS316,304 ,A105 and brasscustomed order and OEM order are welcomedCE certificated , Hex Nipple, Precision Pipe Fitting, Screwed Pipe Fitting