Willis & Bates thread size question.

Discussion in 'Fettling Forum' started by ColinG, Mar 20, 2020.

  1. ColinG

    ColinG United Kingdom Subscriber

    Oct 2, 2017
    Does anyone know what size thread the small dome headed screws that keep the rods attached to the top and bottom of the frame? They might be BA, maybe 5BA or 6BA but I'm not sure. I measured the OD and it was a fraction over 3mm but looking at the BA size chart that is somewhere between 5BA and 6BA so it's not conclusive.

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