RUMCars Forum
General Category => Unusual Microcar Discussion => Topic started by: Basket case on June 23, 2016, 09:36:32 PM
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Back to my Bond MkD resto which has stalled for a year.
I'm stuck for a speedo nut and a nut for my wiper motor. They seem to be 34 tpi which is a very odd size.
Can anybody suggest where I can get a 3/16 x 34tpi and a 3/8 x 34tpi nut?
Thanks
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could it not be .75mm?
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Possibly, for the wiper motor I'm going to try a M8 x .75 nut from a guitar jack socket, but I'm stumped for the smaller one (speedo).
Would they have used metric in the 50's?
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Would they have used metric in the 50's?
Quite a few threads of the time, especially on instrumentation, were BA (British Association) threads. Strangely enough (and "not a lot of people know that"), BA threads are metric!
The standard BA series, known as B1, B2, etc, does use a 0.75 mm pitch - but not in the diameters you quote, unfortunately!
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BA, the Brexit of threaded technology.
Metric fine? BA is used by instrument makers. Not so sure about a wiper motor, but they tend to use a fine pitch. thread on the spindle. If you were near you could have had a delve in my bits boxes.