Brennan 5406-08-06 Steel Pipe Fitting, Bushing, 1/2-14 NPTF Male x 3/8-18 NPTF Female Reducing bushing for connecting smaller pipe to larger pipe Female and male National Pipe Taper Fine (NPTF) threads for connecting different types of pipe Male end is reducing for connecting to smaller female pipe ends Made from steel for strength Hexagonal nut for use with a wrench