just what is 7/32"?

[Ron Nossaman]

>  Yes, these are not threaded all the way up, and there appears to be some 
>"plate-cut" threads at the top.
------------------
>Regards, 
>Ed Foote 


Same with the 1/4" I pulled out of the B yesterday, which baffles me no
end. So how is it that Steinway made pianos with two different agraffe stem
sizes, both having the same threading problem? When was this switch made
from 1/4 to 7/32? 
 
Ron N