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<p>Simon,</p>
<p>Not a definitive answer I'm afraid. I measured an aftermarket
switch (Intermotor sold by Moss). The outer diameter is 0.615"
and the pitch is around 12 TPI. I don't believe that it's a
standard Whitworth - 5/8"-11 TPI. There is a standard metric
thread around this - 16 mm - 2 mm. Possibly too large of a
diameter (0.6299").</p>
<p>Cheers,<br>
</p>
<pre class="moz-signature" cols="72">Bob Haskell
Austin-Healey 3000 roadster registrar</pre>
<div class="moz-cite-prefix">On 9/29/24 07:51, Simon Lachlan via
Healeys wrote:<br>
</div>
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cite="mid:000201db1265$decfaa70$9c6eff50$@alexarevel.plus.com">
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<p dir="LTR"><span lang="en-gb"><font face="Times New Roman">Does</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"><font face="Times New Roman"> anyone know the
size and thread of the so-called “switch overdrive” (AEJ20)?</font></span></p>
<p dir="LTR"><span lang="en-gb"><font face="Times New Roman">Thanks,</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"></span></p>
<p dir="LTR"><span lang="en-gb"><font face="Times New Roman">Simon</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"></span></p>
<br>
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