Parker and Sheaffer barrel threading

[Square Faced Fox]

Hello,

I am trying to make custom barrels for some Parker 21s, 51s and Sheaffer imperials, dolphins and legacys (the cartridge converter models) does anyone know what taps I will need for the barrel threading for any of these?

Any help would be greatly appreciated.

Thanks,

 

[stuckinohio]

I recently inquired about this as well. Tim from Parker "51" really helped me out. He sent me the following but I haven't gotten around to sourcing the taps from Beasly: