[pianotech] What's it's name...

[Joe DeFazio]

>
Hi John,

Lee Valley (which should be renamed "The Most Awesome Tool Store" in  
my opinion) sells countersunk washers.  These are high quality, but  
might be slightly different from the originals in that, though they  
sit flush with the surface, they require counterboring with a forstner  
bit (or such).  In other words, although the inside of the countersunk  
washer is beveled to match the screw head, the outside is  
cylindrical.  Perhaps the originals had beveled outer edges as well.   
Note that the Lee Valley type is actually a stronger fastener than the  
double-beveled type;  the Lee Valley uses compressive force almost  
exclusively to draw the members together, while the double-beveled  
type uses compression but can also have a wedging effect on the top  
member (which can lead to splitting in some cases).

http://www.leevalley.com/hardware/page.aspx?c=2&p=47230&cat=3,41306,41316&ap=1

Joe DeFazio
Pittsburgh


> From: Jon Page <jonpage at comcast.net>
> Date: February 23, 2009 1:31:59 PM EST
> To: pianotech list <pianotech at ptg.org>
> Subject: [pianotech] What's it's name...
> Reply-To: pianotech at ptg.org
>
>
> I need the washer which surrounds the bevel on a wood screw to  
> install on a lid brace.
>
> I've searched: screw flange, countersunk washer/bushing/ferrule. The  
> closest is the
> surface-mounted variety similar to a sound board button.
> -- 
>
> Regards,
>
> Jon Page
>

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