3a 1st end thread class 12 1st end thread quantity per inch made from MS51504A16-12s, altered item using part number AA67007-16-12 manufactured by allan aircraft passivate surface treated nptf 2nd end thread series
2a all ends thread class altered item from MS51510A6s or part number AA67004-6ka from allan aircraft, alteration is a 1/4 npt taped hole in center section passivate surface treated unf all ends thread series
Used on support equipment, b-2 bomber aircraft. 3b 2nd end thread class swivel connector, swivel nut end passivate surface treated threaded external rigid, threaded internal swivel nptf 1st end thread series
Used on f/a-18 e/f. 3b 2nd end thread class 24 2nd end thread quantity per inch (navy) tee, tube - axial swage, swivel nut on side unjs 2nd end thread series
Used on f/a-18 e/f. 3b 3rd end thread class 24 3rd end thread quantity per inch (navy) tee, tube - axial swage, swivel nut on run unjs 3rd end thread series