9/16-18 UNF 2B high pressure | 37deg Flare JIC x MNPT x 37deg Flare JIC | G 1/2 B x 1/2 in. Male National Pipe Thread (MNPT) with 1/4 in. Female National Pipe Thread (FNPT) | MIP Threaded | Spigot x FIP | Threaded MIP | Threaded True Union