tylerite3124
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Does anyone know the size of the screws that hold the tach workings in it’s case? The ones that mount through the backside of the case body? Thanks for any input.
Rick
Rick
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Enjoy.
Interesting. It looks like maybe a 6-40 ?? Or is it a metric screw? In a 60's British device?
Rick, do you need a couple screws?
It's probably a B.A. screw thread. Possibly a OBA (zero BA).
https://en.wikipedia.org/wiki/British_Association_screw_threads
Much of the Lucas, Smiths, Jaeger and similar component manufacturers continued to use British Standard/Whitworth long after the auto manufacturers changed over. I don't have one of those screws handy presently, but I'd venture to say they're still BA.