Image Air Chief Automotive Threaded Coupler Male NPT Product Options Part Number Body Size Thread Thread Size Pipe Thread Material DC1 1/4" NPT 1/4" NPT / NPTF Brass DC101 1/4" NPT 1/8" NPT / NPTF Brass DC103 1/4" NPT 3/8" NPT / NPTF Brass DC5 3/8" NPT 3/8" NPT / NPTF Steel DC504 3/8" NPT 1/2" NPT / NPTF Steel DC7 3/8" NPT 1/4" NPT / NPTF Steel