'74 triumph thread form

gjr

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While I have the transmission apart on my '74 Daytona I thought that I would replace the crosshead screws with socket head capscrews. Does anyone know if the thread form is still Whitworth or did they change to SAE ?

Thanks

Greg
 
SAE (Unified), as Triumph changed the majority of their threads from British Standard to Unified from 1968.
 
LAB is correct, but not all threads as I discovered on my 71 T120, the threads in my crankcase covers were UNC (cycle). Take a known UNF (SAE) bolt and compare it to one of the bolts you have, you should be able to tell instantly.

I hope this helps

Webby
 
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