2a thread class right-hand 0.227" thread length flat countersunk head style 20 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 1.750" thread length pan head style 32 thread quantity per inch navy special project passivate screw surface treated unjf thread series
3a thread class right-hand 0.638" thread length pan head style 40 thread quantity per inch navy special project passivate screw surface treated unjc thread series
3a thread class right-hand 1.011" thread length flat countersunk head style 28 thread quantity per inch passivate screw surface treated unjf thread series
2a thread class right-hand 0.250" thread length flat countersunk head style 32 thread quantity per inch anodize stand-off surface treated unc thread series
3a thread class right-hand 0.437" thread length flat countersunk head style 28 thread quantity per inch three 0.040 in.wide by 0.029 in. deep splines in shank cadmium surface treated unf thread series
3a thread class right-hand 0.400" thread length flat countersunk head style 1.302" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length flat countersunk head style 1.490" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.320" thread length flat countersunk head style 1.052" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
Used on 12f;aircraft starlifter c-141; 05f;aircraft stratolifter. 3a thread class right-hand 0.400" thread length flat countersunk head style 1.052" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.378" thread length pan no. 2 head style 0.115" grip length 28 thread quantity per inch cadmium surface treated unjf thread series