3a thread class right-hand 0.633" thread length hexagon head style 3.485" grip length 24 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.282" thread length dished hexagon head style 0.938" grip length 28 thread quantity per inch retaining element on shank passivate surface treated unjf thread series
2a thread class right-hand 1.222" thread length flat countersunk head style 48 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.375" thread length knurled no. 1 head style 32 thread quantity per inch finish color black fastener chromate zinc fastener surface treated unf thread series