Tank panel - dished washers?

[john.bebb]

Hi Folks, my Square is back on the road only 28 miles so far but all seems good... bit of carb & ign tweaking to be done as to be expected after complete rebuild.
Clay Jones of Acme Stainless (exceedingly helpful gent with fantastic knowledge & superb stailess goodies) informs me that there should be a "dished washer" between the tank panel & the mounting bolts... he has no stock but says he had made a batch for the club & thinks the "ingles spares" guys may these.... please, can anyone further enlighten me on a possible source?
Just by the way; - to avoid accidental distortion of the panel I extend the bolt threads (1/4" 26TPI Cycle) by about 1/2" thus shortening the shoulder, then pass the bolts through the panel and fit a nylock nut... this may then be adjusted (by cautious trial & tweak) such that you have a permant "set" depth by the nylock bearing onto the raised tank boss -
you can then fix the panel bolts with nutlock to prevent them loosening wihout the risk of panel distortion...
added bonus that you can remove & replace the panel at will without loosing the bolts or the washers!
It's a bit tiresome to initially set up but I believe well worth the effort. Cheers, John

[alan.moore]

John
The only 'dished washer' I am aware of is the patent number disc that goes under the head of the front screw. Its part 5153-33. Have you had a look on Draganfly site? it shows the panel fixings....

AOMCC single spares did have the patent disc I bought one a few years ago

Cheers
Alan

[KevinSandford]

I don't know if there should be one or not, but by the description and placement it sounds like a Belleville washer, and probably used to keep the mounting screws from loosening in use.

[MGriffin]

as mentioned the patent washer in one place.