Female Pipe X Male Pipe

A B C
1/4-18 NPTF 1-14 UNS 1/2-14 NPTF
3-8/18 NPTF 1-14 UNS 1/2-14 NPTF
3-8/18 NPTF 1-14 UNS 1/2-14 NPTF