I have used a Shimano freewheel on a NR hub labled "France 34.7 x 1" without any Problems, and without any discernible damage to the threads on a single bike.
Tobit Linke, Dortmund, Germany
> >I have a Maxi-Car tandem drum brake rear hub that I would like to
> >know the freewheel threading compatability with existing vintage
> >freewheels. I have Suntour Perfect (14-30 )freewheel that I would
> >like to thread on. Would this fit or irreversibly damage the
> >threads? It had a Maillard freewheel (French) that was on it but in
> >an unusual 6 speed 13-19 configuration. A tight freewheel for a
> >tandem!
> > Anyway I wanted to know what the thread pitch is and/or which
> >freewheels will work. BT
> >
> >
> >Bruce Thomson Spokane WA 99204
> >(509) 747 4314
> >Masi3v4me@yahoo.com rapidfire10ring@hotmail.com