Joe, If you counted *51* threads per inch, that would be 2 X 25.4, which would work out to .5 mm, which worked for me. Some old screws really are metric. --John Ashcraft On Sat, Feb 23, 2013 at 2:25 PM, Joseph Garrett <joegarrett at earthlink.net>wrote: > Ron said: > "I worked out the numbers, and these are 3-56, a standard size" > > Ron, > For all practical purposes, yes that is what my gauges tell me.....er > sorta.<G> Honestly, it did not occur to me to "do the math" conversion!<G> > If the 4.5mm threaded hole was more than 1/2 inch, it would start to bind > with a 3-56. At least that's what my gauges are telling me.<G> However, in > this application, where the threaded material is less than 1/16", it's not > an issue. > There still remains, tho, what the heck all of those NOS plates/screws, I > have, are? As near as I can calculate, the thread count is around 52 tpi! I > don't know of any "standard" that fills that bill. Go figger. > Thanks for your help and enlightenment.<G> > Best, > Joe > > > Joe Garrett, R.P.T. > Captain of the Tool Police > Squares R I > http://gpianoworks.com/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20130225/32b0c837/attachment.htm>
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