A fitting used with a union nut and a tailpiece to form a union.
NSN 5915-00-834-6217
NSN 6110-00-366-1344
NSN 5998-01-537-1168
NSN 5996-01-633-7979
NSN 5990-00-212-4316
NSN 5985-01-374-8526
NSN 5895-01-497-1126
NSN 6645-01-468-4990
NSN 5975-00-818-3819
NSN 4140-00-908-2763
NSN 6150-01-455-8931
NSN 5975-01-133-1583