2a thread class right-hand 0.500" thread length hexagon head style 32 thread quantity per inch self locking element to be installed in thd end per mil-f-18240 type a cadmium surface treated unf thread series
2a thread class right-hand 0.309" thread length pan no. 2 head style 40 thread quantity per inch navy special project top center of head has 0.125 inch dia by 0.016 inch depression unc thread series
3a thread class right-hand flush countersunk head style 0.807" grip length 14600 double pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand 0.245" grip length 32 thread quantity per inch 5380 double pounds per square inch shear strength cadmium surface treated unjf thread series
