ມາດຕະຖານ: ASTM A182, ASTM SA182 ຂະຫນາດ: asme 16.11 ຂະຫນາດ: 1/4 "NB ເຖິງ 4" NB ແບບຟອມ: Bushings, Head Head Busing ປະເພດ: screwed-threaded npt, bsp, cortstings bspt