5/8-11X1 1/4 GR2 HEX CAP SCR PLN SAE J429 GRADE 2 HEX CAP SCREWS PLAIN FULL THREAD ASME B18.2.1 1996 IFI-7 AF 0.922-0.938” HH 0.378-0.403” AC 1.051-1.083”