The top nut, filler plugs on the top of each leg. Have read conflicting info on TPI, are they 26 or 28 TPI? Mine are a bit butchered and need to clean them up, any suggestions? John
Possibly 26 or 20 TPI if t…
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Hi John, Near certain ther…
Hi John,
Near certain there will be variations but mine were 1 1/8" 20tpi cycle (long roadholder 1955). When I looked for a die the only HSS one I could find cost £150. I'm glad I was sitting down at the time!
If you get really, really lucky you'll find one but they are extremely rare. The only alternative is even rarer; UNS (Unified National Special) which are 60 degree thread form,the same as cycle.
Jim
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Have gone ahead and ordere…
Have gone ahead and ordered two new nuts but unfortunately the old ones have been forced into the stanchions somewhat deforming the internal thread so I still need to clean these up hence needing to know the TPI. What ever it is I will be able to use a tap as a thread chaser. I haven't dismantled the forks yet but am lead to believe they are new stanchions so someone has been a bit brutal. Long Roadholders 52 ES2. John
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Possibly 26 or 20 TPI if they are cyclethreads. New ones in chrome are only about £9 each from Norvil. Other suppliers are available of course. If your threads are burred or damaged you simply need some judicial use of a needle file to recover them, so why are you after the TPI of the threads? If you can find a die it will almost certainly cost more than 2 new nuts.