3a thread class right-hand 0.400" thread length hexagon head style 0.178" grip length 28 thread quantity per inch oxide surface treated unf thread series
2a thread class right-hand 1.187" thread length hexagon head style 3.812" grip length 16 thread quantity per inch zinc surface treated unc thread series
3a thread class right-hand 0.342" thread length round w/wrench flats head style 32 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.750" thread length hexagon head style 20 thread quantity per inch configuration-screw; type-1; grade-2; condition- as formed or stress relieved chromate zinc surface treated unc thread series
3a thread class right-hand 0.375" thread length hexagon head style 0.046" grip length 24 thread quantity per inch six 0.149 in dia. holes drilled perpendicular to each face of hex. cadmium surface treated unc thread series
2a thread class right-hand 1.188" thread length hexagon head style 4.781" grip length 16 thread quantity per inch zinc surface treated unc thread series