A fitting used with a union nut and a tailpiece to form a union.
NSN 2925-01-426-3410
NSN 5930-01-623-3583
NSN 6105-01-561-0330
NSN 6105-01-381-2496
NSN 5990-00-939-0461
NSN 5975-01-612-4808
NSN 5950-01-476-7341
NSN 6320-01-305-5881
NSN 5905-01-568-4031
NSN 5855-00-287-5870
NSN 4140-00-995-3268
NSN 5935-00-765-9619