3a nut thread a thread class right-hand nut thread 0.680" stud thread thread length 2.622" overall length 20 nut thread thread quantity per inch navy special project .106 drilled hole .172 from nut end, locked in unjf nut thread thread series
Used on helicoptor, hh/uh-1. 3a nut thread thread class right-hand nut thread 2.310" overall length 28 nut thread thread quantity per inch stud, locked in locked in unf nut thread thread series
3a nut thread thread class right-hand nut thread 0.270" stud thread thread length 0.894" overall length 28 stud thread thread quantity per inch navy special project locked in unjf nut thread thread series
2a nut thread thread class right-hand nut thread 0.390" stud thread thread length 0.562" overall length 18 stud thread thread quantity per inch stud, ring-locked, 4130 steel, fine thread nut end, coarse thread stud end nut thread to mil-s-8879; stud end thread has a special pitch diameter which mates with a national class 3 taped hole cadmium surface treated locked in unc stud thread thread series
Used on F-119. 2a stud thread thread class right-hand nut thread 0.630" thread length 0.955" overall length 14 stud thread thread quantity per inch keensert stud, heavy duty, special for pwa stud has specific fit restrictions lubricant stud thd surface treated locked in unc stud thread thread series
Used on F-119. 2a stud thread thread class right-hand nut thread 0.6075" thread length 1.1425" overall length 14 stud thread thread quantity per inch keensert stud, heavy duty, special for pwa stud has specfic fit restrictionsand measurements/tolerances including a specific coating lubricant stud thd surface treated locked in unc stud thread thread series