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This picture might help a bit more. You have to remove the areas in yellow. And you have to tweak it a little bit at a time until you get the result you want. Once you get the hang of making these...

I have had success in the past making washers by taking a spade bit (cobalt is perfect for this) and grinding away the center to 1/16" for the pin hole and then grinding it away on the side to form a...

I'm thinking about seeing if I can make a tooling die that will punch them out. I've got some ideas on how to make it pretty simple and straightforward, but I've got to find a little time to play...