On Sun, 2008-09-14 at 18:20 -0400, Bwana Bob wrote:
> I think that they are called "belleville washers".
Belleville washers are coned a bit and often used for very stiff
springs.
Look at www.mcmaster.com catalog number 93497A120 for a metric
Belleville washer suitable for 3mm and #4 or #5 screws..
Look at their catalog number 90134A007 for a spring or wave washer to
fit a #6 or 8 screw, the smallest they have. McMaster-Carr calls a split
lock washer a "spring" washer. That is a different function.
73, Jerry, K0CQ
>
> Bob WB2VUF
>
> Stuart Rohre wrote:
> > Steve,
> > There is a type of washer called a "wavy washer" that has undultations
> > in its flat material, that provides a spring function. One of these
> > might give the feel you want in the PTO.
> >
> > -Stuart Rohre
> > K5KVH
> >
> >
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