A fitting used with a union nut and thread piece to form a union.
NSN 5998-00-495-5649
NSN 6240-00-261-2609
NSN 5925-01-215-1386
NSN 6135-01-315-9214
NSN 5905-00-104-7235
NSN 5960-01-033-1402
NSN 6620-00-930-5680
NSN 6650-01-206-0037
NSN 4140-01-135-4617
NSN 6130-01-448-9717
NSN 5999-00-027-1739
NSN 4140-00-343-2121