2a thread class right-hand 0.640" thread length knurled no. 1 head style 32 thread quantity per inch navy special project passivate surface treated unf thread series
2a thread class right-hand 0.359" thread length knurled no. 1 head style 32 thread quantity per inch thumbscrew passivate surface treated unc thread series
2a thread class right-hand 0.938" thread length thumb no. 4 head style 32 thread quantity per inch navy special project cadmium surface treated unf thread series
2a thread class right-hand 0.400" thread length thumb no. 3 head style 20 thread quantity per inch 0.062 in. @min 0.065 in. max dia hole drilled in each wing of head 0.062 in. min 0.065 in. max dia hole drilled in unthreaded shank 0.250 in. from bearing surface of head cadmium surface treated unc thread series