I purchased taps to make my own 'Vacumatic Tool' for "51"s.

At some time I want to build tools to grab the Aeromatic collar on pens and possibly make some barrels and such for pens. I will need the proper sizes and pitches of the threads to do this. I'll start filling this out:

Standard Vacumatic thread - 5/16"-36TPI
Large Vacumatic Thread -
Standard Vacumatic hood - ?
Demi Vacumatic Hood - ?
Standard Aeromatic Barrel - ?
Standard Aeromatic Hood - ?
Demi Aeromatic Barrel - ?
Demi Aeromatic Hood -?

Other desirable thread pitch sizes?

Esterbrook Nib - ?
Pelikan Nib - ?

It is my hope this will get pinned somewhere folks can easily find it.

Ron