Male Pipe European Interchange Nipple SKU Body Size Threads Material Length HFRF-254-04MP-S 1/4 1/4-18 NPT Steel 1.48 HFRF-254-04MP 1/4 1/4-18 NPT Brass 1.48 HFRF-254-04RMP-S 1/4 1/4-19 BSPT Steel 1.48 HFRF-254-04RMP 1/4 1/4-19 BSPT Brass 1.48 HFRF-254-06MP-S 1/4 3/8-18 NPT Steel 1.56 HFRF-254-06MP 1/4 3/8-18 NPT Brass 1.56 HFRF-254-06RMP-S 1/4 3/8-19 BSPT Steel 1.56 HFRF-254-06RMP 1/4 3/8-19 BSPT Brass 1.56 HFRF-374-06MP-S 3/8 3/8-18 NPT Steel 1.57 HFRF-374-06MP 3/8 3/8-18 NPT Brass 1.57 HFRF-374-06MP-S 3/8 3/8-19 BSPT Steel 1.57 HFRF-374-06RMP 3/8 3/8-19 BSPT Brass 1.57 HFRF-374-08MP-S 3/8 1/2-14 NPT Steel 1.81 HFRF-374-08MP 3/8 1/2-14 NPT Brass 1.81 HFRF-374-08RMP-S 3/8 1/2-14 BSPT Steel 1.81 HFRF-374-08RMP 3/8 1/2-14 BSPT Brass 1.81