Female Pipe European Automatic Coupler SKU Body Size Threads Material Length HFRF-251-04FP 1/4 1/4-18 NPT Brass 2.32 HFRF-251-04GFP 1/4 1/4-19 BSPP Brass 2.32 HFRF-251-06FP 1/4 3/8-18 NPT Brass 2.32 HFRF-251-06GFP 1/4 3/8-19 BSPP Brass 2.32 HFRF-371-06FP 3/8 3/8-18 NPT Brass 2.54 HFRF-371-06GFP 3/8 3/8-19 BSPP Brass 2.54 HFRF-371-08FP 3/8 1/2-14 NPT Brass 2.68 HFRF-371-08GFP 3/8 1/2-14 BSPP Brass 2.68