A fitting used with a union nut and thread piece to form a union.
NSN 6240-00-003-6435
NSN 5935-00-139-3210
NSN 2925-00-704-3690
NSN 6150-01-012-2185
NSN 6620-00-613-3023
NSN 5945-00-251-3915
NSN 5985-01-388-0066
NSN 6620-01-649-9948
NSN 6105-00-586-0338
NSN 6620-00-405-4621
NSN 5835-00-289-9080
NSN 6135-00-377-9165