‹› Image Image E-Series Straight Through Interchange Male Coupler - Retail Package Product Options Hide lower priority columns Part Number All PW-2EM2-BPW-3EM3-BBody Size All 1/4"3/8"Male Thread All NPTFMale Thread Size All 1/4"-183/8"-18Material All Brass PW-2EM2-B 1/4" NPTF 1/4"-18 Brass PW-3EM3-B 3/8" NPTF 3/8"-18 Brass