Male Pipe European Automatic Coupler SKU Body Size Threads Material Length HFRF-251-04MP 1/4 1/4-18 NPT Brass 2.44 HFRF-251-04RMP 1/4 1/4-19 BSPP Brass 2.44 HFRF-251-06MP 1/4 3/8-18 NPT Brass 2.44 HFRF-251-06RMP 1/4 3/8-19 BSPT Brass 2.44 HFRF-371-06MP 3/8 3/8-18 NPT Brass 2.64 HFRF-371-06RMP 3/8 3/8-19 BSPT Brass 2.64 HFRF-371-08MP 3/8 1/2-14 NPT Brass 2.76 HFRF-371-08RMP 3/8 1/2-14 BSPT Brass 2.76