3a thread class right-hand 0.623" thread length 3.344" overall length 20 thread quantity per inch 0.875 in. between flats of hex. shoulder cadmium surface treated round, closed w/shoulder unf thread series
3a thread class right-hand flush countersunk head style 0.193" grip length 28 thread quantity per inch 125000 single pounds per square inch shear strength stud length 0.734 in. min passivate surface treated unjf thread series
3a thread class right-hand flush countersunk head style 0.615" grip length 20 thread quantity per inch 125000 single pounds per square inch shear strength outboard pylon aft fitting attachment is 0.510 in. long with internal threads 0.2500-28 unjf-3b passivate surface treated unjf thread series
