2a thread class right-hand 1.062" thread length hexagon head style 16 thread quantity per inch second counterbore on shank end 0.562 in. dia threaded 0.250-18 npt counterbore threaded unf thread series
3a nut thread thread class right-hand nut thread 0.906" nut thread thread length 1.938" overall length 13 stud thread thread quantity per inch 0.094 in. w by 0.031 in. radius fillet between threaded stepped unc stud thread thread series
2a thread class right-hand 0.181" thread length hexagon extended washer head style 20 thread quantity per inch 0.180 in. min. 0.185 in. max dia by 0.020 in. min, 0.040 in. max lg point at thd end zinc surface treated unc thread series
3a thread class right-hand 0.460" thread length hexagon head style 0.810" grip length 24 thread quantity per inch cadmium or zinc surface treated unf thread series
2a thread class right-hand 0.560" thread length round extended washer head style 32 thread quantity per inch cadmium screw surface treated unc thread series
