1" Teflon Washer
I made up some 1" thru hole Teflon washers, I've used these for years during rudder installations. I use these between any item that makes metal to metal contact. Used between the safety collars and the top rudder brace to control up and down movement in your rudder.
O.D. is 1 1/2", I.D. is 1 1/32", Thickness is 1/8".