Speedo securing thumb nuts replacements?

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Ian28
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Speedo securing thumb nuts replacements?
I appear to be missing one of the two small knurled thumb nuts that should hold the speedo in the dashboard. Does anybody know a good source for these? Or what size of thread is used? I hoped I might find it in the footwell but unfortunately not, maybe it got vacuumed by the previous owner after it presumably came loose and dropped off.... I'm sure I could find something usable in my box of bits but be nice to get the proper item Thanks
Jonathan Kay
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I wouldn't assume it's the same thread on all instruments... 

... but you can get them in several sizes here on Ebay.

Jonathan

Ian28
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Yep thanks Jonathan I had seen those but wanted to be sure of the size and or metric/imperial, perhaps there is a nut expert on here...who will give the nutty answer
Jonathan Kay
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Just checked on a Caerbont Caterham rev counter: M4.

Jonathan

ScottR400D
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Good job, JK! 

Ian28
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Thank you Jonathan My order is in
Wrightpayne
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For a moment I though it was a swimwear malfunction!! 

Ian28
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Replacement knurled fastener thingy arrived today and fitted straight on 2012 SV speedo, thanks again Jonathan
Jonathan Kay
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: -)

Jonathan

PS: I'm not offering to help with Ian's problem...