Prepare your semi truck to be Ready for the Road Ahead™, with the Hendrickson 4" Eccentric Flanged Alignment Outer Washer that improves a vehicle's suspension capabilities. By creating a snug fit around the outside of nuts and bolts, this replacement component is able to decrease vibrations and increase ride quality. Built with a universal design for chemical trailers, crude trailers, dry bulk trailers, gas trailers, and other trailer applications. FleetPride is your First Click in Heavy Duty®.