2a thread class right-hand 0.500" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated item must comply with requirements of defense supply center philadelphia production standard PO0302nrp unf thread series
3a thread class right-hand 0.438" thread length pan head style 32 thread quantity per inch screw, machine cadmium screw surface treated unf thread series
2a thread class right-hand 0.484" thread length flat countersunk undercut head style 20 thread quantity per inch anodize screw surface treated unc thread series
Used on F18E/F. 3a thread class right-hand 0.363" thread length pan no. 2 head style 32 thread quantity per inch (navy) screw, machine; boeing bolt-pan head, geardrive drilled 0.075" diameter hole on bolt end unjf thread series
Used on f-18 fighter aircraft. 3a thread class right-hand 0.363" thread length pan no. 2 head style 32 thread quantity per inch (navy) screw, machine; bolt-pan head, gear drive, titanium drilled 0.075" diameter hole on bolt end unjf thread series
Used on f-18 fighter aircraft. 3a thread class right-hand 0.403" thread length pan no. 2 head style 32 thread quantity per inch (navy) screw, machine; bolt-pan head, gear drive, titanium drilled 0.081" diameter hole on bolt end. unjf thread series