3a thread class right-hand 1.063" thread length hexagon head style 0.070" hole diameter 1.047" grip length 16 thread quantity per inch unf thread series
3a thread class right-hand flush countersunk head style 0.875" grip length 20 thread quantity per inch 108000 single pounds per square inch shear strength tapped thru shand from head thread size 1/4-28 unjf-3b, 0.510 in. lg cadmium surface treated unjf thread series
2a thread class right-hand 0.058" thread length flat countersunk head style 56 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.2313" thread length pan no. 2 head style 40 thread quantity per inch nickel or passivate screw surface treated unc thread series
2a thread class right-hand 0.250" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.234" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.671" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.546" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.375" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 1.171" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 1.250" thread length flat countersunk head style 40 thread quantity per inch navy special project passivate screw surface treated unc thread series
2a thread class right-hand 1.500" thread length flat countersunk head style 40 thread quantity per inch navy special project passivate screw surface treated unc thread series