It's an upgrade if they go bad or when you replace the screws. Also I added them between the legs and bottom bowl. Weber doesn't but I did. I got rid of the slotted 5/8 screws and added 1/2 flanged button head 18-8 screws. Much better then oemCurious... what upgrade are these used for
Weber does include fiber washers that go on the outside of the charcoal bowl where the legs attach. Maybe someone forgot to install them on your WSM when it was new?Also I added them between the legs and bottom bowl. Weber doesn't but I did.
I got rid of the slotted 5/8 screws and added 1/2 flanged button head 18-8 screws. Much better then oem