A fitting used with a union nut and thread piece to form a union.
NSN 5930-01-495-9022
NSN 6320-01-116-9866
NSN 6620-01-357-7751
NSN 6220-01-009-8329
NSN 4140-01-250-4202
NSN 5945-01-283-2938
NSN 6145-01-005-1374
NSN 5930-01-555-8749
NSN 5935-01-497-1994
NSN 5945-00-246-5740
NSN 5990-00-078-7807
NSN 6135-01-494-3607