2a 2nd end thread class 12 2nd end thread quantity per inch flange, 5.000 in. w, located 0.562 in. from 3.375 thd end to flange edge oxide surface treated un 1st end thread series
3a first fluid end connection thread class 3.750" overall length bulkhead threads on 1st fluid end connection anodize surface treated coupling assembly unf first fluid end connection thread series
Used on grumman a10a aircraft. 3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch anodize surface treated unj 1st end bulkhead thread series
Used on grumman a10a aircraft. 3a all ends thread class the item is a flight safety critical aircraft part (fscap) passivate surface treated unjf all ends thread series