A fitting used with a union nut and thread piece to form a union.
NSN 5935-00-227-7325
NSN 5910-01-173-2812
NSN 4140-01-412-1566
NSN 6145-00-699-8963
NSN 5985-01-134-8108
NSN 5925-01-044-9565
NSN 6320-01-253-9585
NSN 5998-01-175-9460
NSN 5920-01-500-5858
NSN 5990-00-373-9787
NSN 5996-01-391-9585
NSN 5835-01-381-9565