Cad Plated Hex Head Bolt, Drilled Shank | AN7-22 Freight What are the three different

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Cad Plated Hex Head Bolt, Drilled Shank | AN7-22 Freight What are the three differentBolt: Hex Head,St, Drilled Shank 5Pk AN7 22 Aviation Hardware AN3 AN8 cadmium plated steel bolts (drilled and undrilled). CADMIUM PLATED BOLTS CONFORM TO QQ P 416; CORROSIONRESISTANT STEEL BOLT CONFORMS TO MIL B 6812. Available with or without single hole through shank and or single hole through head. Part numbers as shown are for drilled shanks (e. g., AN3 3); for undrilled shanks, add ''A'' at the end of the part number (e. g., AN3 3A); for drilled