3a thread class right-hand 2.000" thread length knurled no. 1 head style 11 thread quantity per inch navy special project cadmium surface treated unjc thread series
2a thread class right-hand 0.500" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.397" thread length flat countersunk head style 0.500" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.568" thread length hexagon head style 3.240" grip length 24 thread quantity per inch aluminum surface treated unjf thread series