A fitting used with a union nut and thread piece to form a union.
NSN 6145-01-462-1120
NSN 6135-00-416-2898
NSN 6220-00-458-2160
NSN 5905-01-058-3866
NSN 5999-00-873-3088
NSN 5915-00-968-7515
NSN 7035-01-527-3883
NSN 5930-01-421-8475
NSN 4140-01-415-5595
NSN 5925-00-116-8706
NSN 6150-00-818-4787
NSN 5920-00-421-7546