From:Matthew Smith e-mail:amwshop@gmail.com
Subject:RE: Henderson Fork Thread Sizes/Taps/Dies Date:Mon Oct 2 13:06:23 2017
Response to:6660
KJ, DLX and EX are the same on both threads, bar nuts are 7/8-24 and center stem is 1 1/8-24. Try MSC for commercially made taps and dies.
https://www.mscdirect.com/browse/tn/?searchterm=7%2F8-24+tap&hdrsrh=true

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Can anyone tell me the inner thread size for Henderson and Excelsior forks ?? this would be the the thread for the two holes on either side of the fork post that the two plugs screw into. Is the size the sam for all Henderson - k, deluxe and kj ? Same for excelsior ?
Next, does anyone know the thread sixe for the fork center post ??
Lastly, is anyone making taps/dies that size ??
Best
Dan