Used on c-17a acft. 3a 2nd end thread class flouride phosphate conversion coat threads per ams 2486 (entire fitting optional) unjf 2nd end thread series
Used on aircraft, (ac-130a, ac-130h, mc-130h, ec-130e, hc-130). 3a all ends thread class 2.807" overall length bulkhead connection male coupling half unjf all ends thread series