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Tyre Valve Stem Cap Thread.....what is it?

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Phil
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2012/06/03 11:10:15 (permalink)
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Tyre Valve Stem Cap Thread.....what is it?

Ok guys, Im laying out the challenge...can anyone identify the thread used for tyre valve stem caps??!!
 
Im using a truck remote access extension to pressurise my Accusump and need a thin/half nut to secure the valve stem in the wheel arch access panel.
 
So far I can confirm the diameter is approx 8mm or 5/16"
 
The thread is finer than 5/16"unf and 8x1mm metric fine.
 
Anyone have any ideas what it actually is?
 
I have a feeling it will be a unique thread like the male thread on the tips of spark plugs...it doesnt match anything known to man!!
 
Cheers,
 
Phil.

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    Noono
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    Re:Tyre Valve Stem Cap Thread.....what is it? 2012/06/05 16:43:54 (permalink)
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    It is known to man, but you'll have to machine up a nut I'd say
     
    5/16" SAE FINE (5/16" dia. - 32 TPI)
     
    Cheers
     
     
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    Flighter
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    Re:Tyre Valve Stem Cap Thread.....what is it? 2012/06/05 19:39:36 (permalink)
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    Who'd a thunk it, but there is more than one size of Schrader valve out there too:
     
    http://en.wikipedia.org/w...rader_valve#Dimensions
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