A fitting used with a union nut and a tailpiece to form a union.
NSN 5998-01-641-4670
NSN 6135-00-505-0679
NSN 6135-00-152-8729
NSN 5920-01-586-0553
NSN 6645-01-385-7033
NSN 5945-01-519-8887
NSN 5965-01-553-6689
NSN 5935-01-314-9060
NSN 5985-01-256-2547
NSN 5905-01-429-9943
NSN 6320-01-616-0843
NSN 5945-01-013-2096