A fitting used with a union nut and thread piece to form a union.
NSN 5945-00-470-2029
NSN 5925-00-827-0927
NSN 6645-00-497-3495
NSN 5985-00-630-6336
NSN 5935-01-452-5502
NSN 5998-01-412-6743
NSN 5990-00-320-2779
NSN 4140-01-575-4887
NSN 4140-01-092-9847
NSN 6220-01-424-9667
NSN 5960-01-495-0859
NSN 6110-00-359-5571