1-8X2 1/2 GR5 HEX F/T CAP SCR ZC SAE J429 GRADE 5 HEX CAP SCREWS ZINC FULL THREAD ASME B18.2.1 1996 IFI-7 AF 1.469-1.500” HH 0.591-0.627” AC 1.675-1.732”