A fitting used with a union nut and thread piece to form a union.
NSN 5975-01-543-4933
NSN 5930-00-788-9476
NSN 5915-00-176-2548
NSN 5925-01-370-0955
NSN 6610-01-527-2395
NSN 5895-00-378-5587
NSN 5930-01-415-3111
NSN 6240-01-449-1387
NSN 5910-01-553-1071
NSN 6650-00-202-4540
NSN 5998-00-529-8498
NSN 6320-01-492-1976