A fitting used with a union nut and thread piece to form a union.
NSN 6130-01-341-0986
NSN 6110-01-179-3669
NSN 6320-01-267-5117
NSN 6130-00-605-7087
NSN 5960-01-264-2087
NSN 5996-01-197-7005
NSN 5996-00-079-0384
NSN 5999-00-236-2566
NSN 5990-01-359-8334
NSN 6240-01-393-5945
NSN 5855-00-885-8452
NSN 5999-01-375-9265