2a thread class right-hand 7.672" thread length hexagon head style 12 thread quantity per inch shoulder 1.909 in. min., 1.909 in. max lg; undercut 0.018 in. max; 2.250 in. nom shoulder dia unf thread series
2a thread class right-hand 4.750" thread length flat chamfer head style 20 thread quantity per inch slot on one side of screw 0.125 in. min; 0.130 in. max dia; 3.000 in. nom lg passivate surface treated unf thread series
3a thread class right-hand 1.025" thread length headless (setscrew) head style 20 thread quantity per inch 32 microinches on point; smaller cup point 0.375 in. min 0.376 in. max dia; 0.600 in. nom lg oxide surface treated unrf thread series
2a thread class right-hand 0.190" thread length headless (setscrew) head style 32 thread quantity per inch passivate fastener surface treated unc thread series
3a thread class right-hand 0.428" thread length headless (setscrew) head style 32 thread quantity per inch passivate surface treated unjc thread series