3a thread class right-hand 0.406" thread length hexagon head style 1.750" grip length 32 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.438" thread length hexagon head style 1.422" grip length 28 thread quantity per inch cadmium surface treated unf thread series
round head style nonmachine thd styles are narrow flute ty e, thru slot ty d or g, double flute ty f, or wide flute ty t, h, orbt cadmium surface treated
