1/2-13X2 1/2 GR5 HEX F/T CAP SCR PLN SAE J429 GRADE 5 HEX CAP SCREWS PLAIN FULL THREAD ASME B18.2.1 1996 IFI-7 AF 0.736-0.750” HH 0.302-0.323” AC 0.840-0.866”