I am in need of at least 15 of these special regulating screws (see the
attached photo at the link below). They are used on the Kranich & Bach
player action to adjust a pair of bumper rails. They were not exclusive
to K&B as I have seen them used on piano (not player) actions -- Ivers
& Pond, for example -- for a similar purpose so they must have been
something made by a piano industry supply company. The short end has
a right-hand thread and the longer side is a left-hand thread.

Does anyone have any of these? Are new ones still being made today and
used in any modern piano actions? If so, where might I purchase them?

Thanks,
Dave Krall
Hammond, Indiana

 [ https://www.mmdigest.com/Attachments/21/12/14/211214_070332_100_4864.JPG