Used on mv-22 aircraft (v-22 lrip 1 e-nsn isil). 3a thread class 0.545" thread length flat countersunk head style 32 thread quantity per inch screw, 100 degree flush head, full thread, six lobe recess passivate screw surface treated unjf thread series
3a thread class right-hand 0.720" thread length pan head style 28 thread quantity per inch screw, pan head, phillips recess, full threded, A286 cres cadmium screw surface treated unf thread series
Used on 2350-01-081-8138. 2a thread class right-hand 0.750" thread length pan no. 2 head style 24 thread quantity per inch screw, machine, pan head, cross recessed, self-sealing, integral silicon o-ring, self-locking passivate screw surface treated installation torque is 23 lbs unc thread series