3a 1st end bulkhead thread class aviation critical safety item / flight safety critical aircraft part (acsi/fscap) ; modified by lewis spec 103 unjf all ends thread series
Used on aircraft--b-1b, hornet f/a-18, b-2 bomber; awacs e-3a, eagle f-15, f-16, phantom f-4;trainer, b-1b aircraft; support equipment, b-2 bomber. 3a all ends thread class 18 1st end thread quantity per inch weapon system essential unjef 2nd end thread series
2a 2nd end thread class 18 1st end thread quantity per inch supports clark model 290m; tractor, wheeled, ind., diesel driven; med dbp, nsn 2420000889384, w/rops nsn 2420010590090 cadmium surface treated unf 2nd end thread series