TY - RPRT TI - Screw-thread standards for federal services 1957. Part II: pipe threads, including dryseal pipe threads; gas cylinder valve outlet and inlet threads; hose coupling, including fire-hose coupling threads; and hose connections for welding and cutting equipment PY - 1959 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS HB 28supp1957pt2 DO - 10.6028/NBS.HB.28supp1957pt2 ER -