PEX Pipe Fitting, Swivel Coupling, 3/8 PEX x 1/2-In. FPT
3/8 pex x 1/2 fpt swv bsp, swivel coupling, for pex or polybutylene, use to connect to a faucet or any 1/2" mpt, bsp means it will also work on a faucet that has parallel threads which are sometimes used in manufactured homes & rv's.