1 1/2-6X3 1/2 GR5 HEX CAP SCR ZINC SAE J429 GRADE 5 HEX CAP SCREWS ZINC FULL THREAD ASME B18.2.1 1996 IFI-7 AF 2.175-2.250” HH 0.902-0.974” AC 2.480-2.598”