2a thread class right-hand 1.620" thread length hexagon extended washer head style 20 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 1.500" thread length hexagon head style 11 thread quantity per inch modified ms-35311-163, by insertion of self locking element unc thread series
2a thread class right-hand 1.250" thread length hexagon head style 13 thread quantity per inch modified ms-35311-123, by insertion of self locking element unc thread series
2a thread class right-hand 1.126" thread length hexagon head style 0.0605" hole diameter 20 thread quantity per inch zinc surface treated unf thread series