Ensure your semi truck is Ready for the Road Ahead™ with improved suspension, with the Hendrickson 4" Concentric Flanged Alignment Inner Washer. To help with the alignment of the suspension, this replacement washer creates a snug fit around the nuts and bolts. Fashioned with a universal design to fit chemical trailers, crude trailers, dry bulk trailers, and gas trailers. FleetPride is your First Click in Heavy Duty®.