2a thread class right-hand 1.750" thread length hexagon head style 8.500" grip length 18 thread quantity per inch zinc surface treated unc thread series
2a thread class right-hand 1.250" thread length hexagon head style 9.000" grip length 20 thread quantity per inch zinc surface treated unf thread series
2a thread class right-hand 1.620" thread length hexagon extended washer head style 20 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.313" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series