3a thread class right-hand 0.989" thread length hexagon head style 12 thread quantity per inch cadmium surface treated concentric hole unthreaded unf thread series
3a thread class right-hand 0.469" thread length hexagon head style 24 thread quantity per inch cadmium surface treated counterbore unthreaded unf thread series
3a thread class right-hand 0.484" thread length flat chamfer head style 40 thread quantity per inch undercut between head nickel surface treated unc thread series
2a thread class right-hand 0.203" thread length pan no. 2 head style 32 thread quantity per inch undercut for thread relief cadmium surface treated unf thread series