Hole size for bolt

Discussion in 'UK Motorcycles' started by Bill, Oct 27, 2003.

  1. Bill

    Bill Guest

    What size hole does a 10mm headed bolt need to go through, is a normal 10 mm
    headed bolt M6 or M8?

    I don't have access at the moment to any to measure.

    Cheers

    Bill
     
    Bill, Oct 27, 2003
    #1

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  2. Bill

    sweller Guest

    Shank size Thread Spanner
    Pitch Size
    M6 (6mm) 1.00mm 10mm
    M8 (8mm) 1.25mm 13mm (12mm on some Japanese bolts)
    M10 (10mm) 1.50mm 17mm
    M12 (12mm) 1.75mm 19mm

    Tapping Drill Size = Screw Diameter - Thread Pitch (rule of thumb).
    For the shank hole, I'd use an oversize drill bit about 0.5 mm

    HTH
     
    sweller, Oct 27, 2003
    #2

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  3. Bill

    Slider Guest

    The clue is in the '6' and '8'. M6 = 6mm, can you guess what M10 is? ;-)
     
    Slider, Oct 27, 2003
    #3
  4. Bill

    Bill Guest

    Brilliant, cheers

    Bill
     
    Bill, Oct 27, 2003
    #4
  5. Bill

    Slider Guest

    D'oh; ignore that. Fools rush in etc...
     
    Slider, Oct 27, 2003
    #5
  6. Bill

    mb Guest

    Bolts with a 10mm head are *normally* M6.
     
    mb, Oct 27, 2003
    #6

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