3a thread class right-hand 0.282" thread length flat countersunk head style 1.000" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 0.500" thread length round w/wrench flats head style 0.188" grip length 60 deg chamfer on underside of one wrench flat cut to junction of shank passivate surface treated unf thread series
3a thread class right-hand 0.630" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength cadmium surface treated unjf thread series
2a thread class right-hand 0.938" thread length hexagon extended washer head style 18 thread quantity per inch cadmium surface treated unc thread series
2a thread class 0.619" thread length 20 thread quantity per inch navy special project furnished with one lock washer rockwell c scale 40 min, 50 max unc thread series
2a thread class right-hand 0.750" thread length hexagon extended washer head style 16 thread quantity per inch cadmium surface treated unc thread series
2a thread class right-hand 0.221" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series