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How to remove a rounded hex grub screw?

Discussion in 'General DIY' started by devs, 8 Jun 2021.

  1. jj4091

    jj4091

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  3. Mottie

    Mottie

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    The end of a file with the handle removed is a very good stud/bolt extractor. Drill a centered hole, lightly tap the tang in and unscrew.
     
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  4. Measure the outside diameter, with a caliper Vernier/micrometer, accurately.

    Then measure over the tips of the 3 good threads (2 pitches), this will tell us the pitch.

    Both these dimensions need to be accurate.
     
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