That's not a washer man. It's a giant nut. The reason for it is bc my jeep has like a 3" lift on it and that spacer nut makes the sway link line up with top and bottom brackets. I'm not replacing the sway bar. Just the links and bushings. My jeep is 20 years old. And needs alot of tlc with the suspension and steering not to mention it has the DW and has been hardly used for years. Has like 120k miles on it.