A fitting used with a union nut and thread piece to form a union.
NSN 5915-01-411-3544
NSN 5915-00-827-5825
NSN 2925-01-194-9737
NSN 5935-01-217-6123
NSN 5910-01-013-8861
NSN 5990-01-245-7299
NSN 5960-01-258-0814
NSN 5905-00-040-9183
NSN 5910-01-379-2965
NSN 6645-01-170-5402
NSN 5950-01-502-5342
NSN 5930-01-604-2787