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  • you guys are so wise! is there an allen key 'driven' M3?

  • I have some 40mm ones here.
    But not with a full length thread.
    EDIT - Give these guys a call 020 7405 1215.
    Clerkenwell Screws. Open until lunchtime today.
    They sorted out some fully threaded M4 x 40mm S/S cap head machine screws for my chain tugs.

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