19mm long bolt ? total length 19mm or threaded part ?

Discussion in 'Engineers' Talk' started by dvddvd, Sep 23, 2008.

  1. dvddvd

    dvddvd Well-Known Member

    Hi is a 19mm long bolt the actual threaded part or total length ? thanks
     
  2. Wheresthisbitgo

    Wheresthisbitgo New Member

    19 mm will be the measurement from the underside of the head to the end of the bolt. The length of the thread will probably be 2 to 2½ diameters.
     

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