I've got a Yamaha here too with 3/8" bolt and 20 teeth per inch thread. I guess it varies from piano bench to piano bench. Scott Scott Gray wrote: > 5/16" standard thread and use a lock washer too. > > Scott Gray > Associate Member PTG > > > Brian Doepke wrote: >> >> What is the standard size square bolt needed to replace the wing nuts >> used inside the benches to secure the legs? >> >> >> >> /Brian P. Doepke, RPT/ >> >> /President-PTG Indiana Chapter/ >> >> */A.A.A. Piano Works, LLC/* >> >> */Piano Tuning + Service/* >> >> www.aaapianoworks.com >> >> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091026/75bd4995/attachment.htm>
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