3a thread class right-hand 0.453" thread length 28 thread quantity per inch rounded to 0.250 in., 0.859 in. from head to 3.500 in. along length chromium surface treated unf thread series
2a thread class right-hand 0.620" thread length hexagon head style 20 thread quantity per inch undercut below shoulder 0.366 inch min, 0.376 inch max dia; 0.060 inch long cadmium surface treated unf thread series
2a thread class right-hand 0.562" thread length round w/wrench flats head style 12 thread quantity per inch hole in head 0.250-20 unc 2b, 0.625 in. deep un thread series
3a thread class right-hand 0.732" thread length dished hexagon head style 18 thread quantity per inch dry film lubed shoulder. undercut below shoulder 0.050 inch min, 0.083 inch max length passivate surface treated unf thread series
