metalwork stainless steel 304 forged pipe fitting reducing adapter 1/2" npt female x 3/8" npt male reducer connector 2000psi (1 pcs) metalwork this reducing adapter is a stainless steel 304 pipe fitting with 3/8 inch male national pipe taper (npt) threads on one end and 1/2 inch female npt threads on the other end for connecting two pipes of different sizes. the adapter has npt threads for creating a tighter seal than straight threads and a hexagonal shape for increased leverage and use with a wrench during installation and disassembly. it is made from stainless steel 304 for resistance to chloride corrosion and greater corrosion resistance than stainless steel 302.