The Hendrickson 12" x 4" x 4" Shock absorber Bolt Kit is designed to provide strength and durability for your shock absorber. This kit includes multiple bolts, nuts and washers, depending on the installed or replaced shock absorber. The higher grade of the bolts and nuts included in the kit can vary depending on the application. The bolts' flat surface helps distribute the load evenly when tightening the bolts, ensuring a secure fit. FleetPride is your First Click in Heavy Duty®.