2a thread class right-hand 0.294" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.280" thread length round w/wrench flats head style 28 thread quantity per inch head has two holes; one min. 0.230 unjf thread series
2a thread class right-hand 2.500" thread length knurled no. 1 head style 18 thread quantity per inch navy special project passivate surface treated unc thread series
3a thread class right-hand 0.453" thread length dished hexagon head style 2.125" grip length 20 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.877" thread length dished hexagon head style 2.490" grip length 18 thread quantity per inch cadmium surface treated unjf thread series