Those are not lock plates. They are thrust plates and the distribute the
clamping load from the bolts. Without them, the bolt heads will distort the
metal flange for the boots. You can use hardened washers to repalce them if
the outer diameter will fit. They are not expensive and they are available
so you can get another set.

Dennis

>From: miguel pacheco <mundopacheco@GMAIL.COM>
>Reply-To: miguel pacheco <mundopacheco@GMAIL.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: CV Bolt Lock Plates
>Date: Tue, 12 Aug 2008 12:23:04 -0600
>
>I have always reused these when replacing, rebuilding, etc. the CV
>Joints. This time I think I accidentally tossed them and it brings up
>this question :
>I realize they probably achieve their description, but I have the
>Syncro at a remote location, awaiting the rear axles I just rebooted
>and repacked and I will likely not have the Bolt Lock Plates in hand
>when I'm ready to throw them back on. It must be ok to run them
>without these plates for a few miles......right?
>
>--
>Gracias,
>                     Miguel