A fitting used with a union nut and thread piece to form a union.
NSN 5930-01-246-3721
NSN 6610-01-376-9199
NSN 5990-01-254-2936
NSN 5930-00-610-6741
NSN 5996-00-098-3864
NSN 6610-01-330-7839
NSN 4140-01-449-4193
NSN 7035-01-365-6246
NSN 6610-01-649-5326
NSN 5930-01-630-2117
NSN 5895-00-459-3396
NSN 5960-01-449-1310