[TR] Rocker feed screw.

[DAVID MASSEY]

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.
Dave 


 

    On Wednesday, April 30, 2025 at 05:34:25 PM CDT, Don Hiscock <don.hiscock at gmail.com> wrote:   

 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.
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?
On Wed, Apr 30, 2025 at 4:27 PM John Macartney <johnbmacartney at gmx.com> wrote:

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.

Jonmac
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