A fitting used with a union nut and thread piece to form a union.
NSN 5895-01-633-3000
NSN 5905-01-593-3967
NSN 5945-01-420-5891
NSN 6320-01-516-3836
NSN 5999-01-278-0032
NSN 5855-01-191-3404
NSN 6145-01-515-2450
NSN 5996-00-433-6499
NSN 6220-01-460-5646
NSN 6110-00-663-4054
NSN 5895-00-365-1188
NSN 5975-00-541-8531