2a thread class right-hand 0.357" thread length pan no. 2 head style 40 thread quantity per inch navy special project passivate surface treated unc thread series
2a thread class right-hand 0.364" thread length flat chamfer head style 32 thread quantity per inch washer, rockwell c scale 40 min, 50 max unf thread series
3a thread class right-hand 0.687" thread length flat countersunk head style 32 thread quantity per inch cadmium fastener surface treated unjf thread series