<div dir="ltr"><div class="gmail_default" style="font-size:small">Are you referring to the Tenax studs on the windscreen frame, Dave? I'd have guessed those were BA threaded.</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Apr 30, 2025 at 8:35 PM DAVID MASSEY <<a href="mailto:dave1massey@cs.com">dave1massey@cs.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div><div style="font-family:Arial,Helvetica,sans-serif;font-size:16px"><div><div dir="ltr">There are Whitworth fasteners used on the TR3 windshield. I bought a set of Whitworth taps and dies when I restored my windscreen for that reason. But, no, that is not the engine.</div><div><br></div><div><div style="color:black;font-style:normal;font-size-adjust:none;font-weight:normal;font-stretch:normal;font-size:12pt;line-height:normal;font-family:Arial,Helvetica,sans-serif"><div style="color:black;font-style:normal;font-size-adjust:none;font-weight:normal;font-stretch:normal;font-size:12pt;line-height:normal;font-family:Arial,Helvetica,sans-serif"><div><font size="4">Dave <br></font></div><div><span style="font-size:10pt;font-family:sans-serif;color:black"><br></span></div><br></div></div></div></div>
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On Wednesday, April 30, 2025 at 05:34:25 PM CDT, Don Hiscock <<a href="mailto:don.hiscock@gmail.com" target="_blank">don.hiscock@gmail.com</a>> wrote:
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<div><div id="m_-5817955450121499882ydpd5c7d075yiv2127974545"><div><div dir="ltr"><div style="font-size:small">I'm not aware of any Whitworth threads installed by S-T (at least on a sidescreen car). There may be some Whitworth and BA threads on bought-in components, like SU carbs, Smiths, and possibly some Lucas. But I'll be shocked sh*tless to learn legit Withworth threads were used in a S-T engine.</div><div style="font-size:small"><br clear="none"></div><div style="font-size:small">Jonmac, I'd never heard that metric and inch fasteners were used on the line at the same time depending on the end market for the vehicle. That's a fascinating bit of trivia, and one of the reasons we love having you here! What time period are you talking about for that? Maybe 1970s?</div></div><br clear="none"><div><div id="m_-5817955450121499882ydpd5c7d075yiv2127974545yqtfd04561"><div dir="ltr">On Wed, Apr 30, 2025 at 4:27 PM John Macartney <<a shape="rect" href="mailto:johnbmacartney@gmx.com" rel="nofollow" target="_blank">johnbmacartney@gmx.com</a>> wrote:<br clear="none"></div></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div id="m_-5817955450121499882ydpd5c7d075yiv2127974545yqtfd21694">I have my doubts about the offending item having Whitworth ancestry. While I’ve long been a Whitworth advocate and enthusiast (for purely patriotic reasons) I think it might be worth going down a metric route. There was a time when the factory briefly reverted to metric hardware that was market specific for European build. Needless to say, certain bits of hardware went where they shouldn’t (or inadvertently wound up there). Might this be a possible avenue to explore? Evaluate metric fine and coarse pitch threads.<br clear="none">
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