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- Proaim Mitchel to Euro Adapter Plate

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  • What size of screw in bolt does the adapter accept ? 1/2"-13 or metric m12? What are the dimensions of the castle nut (the screw on bottom nut)?

    The adapter accepts M12 - 1.75mm screw size.
    The dimensions of the castle nut is 2 3/4'' - 12UN.