2a thread class right-hand 0.438" thread length hexagon head style 13 thread quantity per inch undercut below shoulder 0.062 in. w by 0.375 in. dia phosphate surface treated unc thread series
2a thread class right-hand 0.750" thread length hexagon head style 0.750" grip length 20 thread quantity per inch cadmium or zinc surface treated unf thread series
2a nut thread a thread class right-hand nut thread a 4.000" nut thread a thread length 12.625" overall length 16 nut thread a thread quantity per inch unc nut thread a thread series
2a thread class right-hand 0.562" thread length 32 thread quantity per inch shoulder located 0.688" from end cadmium or zinc surface treated round bend unf thread series