The various joints on the excavator arm and bucket attachment of my 13.5K Lbs 2013 Hyundai excavator have these shims with tabs. They fill like cellulose gasket material. They are about 1/16" thick. One shown below I found warn out. What are these called?
They are just "shims". Typically they'll be a high density urethane, although I have seen fiber. There was thread on here where someone was making/ selling them for far less than I pay for them at caterpillar. The urethane outlasts steel shims.