A fitting used with a union nut and a tailpiece to form a union.
NSN 5935-01-294-8338
NSN 5996-00-181-0207
NSN 5998-01-595-4598
NSN 5945-01-393-7346
NSN 2925-01-534-7314
NSN 5950-01-609-0777
NSN 5998-01-519-2084
NSN 2925-00-583-9669
NSN 6645-00-269-2764
NSN 5945-00-067-8616
NSN 5855-01-003-0848
NSN 6620-00-602-5832