Crown Automotive Rear Leaf Spring and Shackle Bolt Kit

Technical engineering specifications for rear leaf spring and shackle mounting hardware kit. Designed for direct fitment on Jeep Cherokee XJ (1984-2001) and Comanche MJ (1986-1992) models. Kit includes six shouldered hex flange bolts, six hardened flat washers, and six prevailing torque lock nuts. Fasteners manufactured to Grade 10.9 (Class 10.9) tensile strength with yellow zinc plating for corrosion resistance. Fine thread metric dimensions match factory welded nut plates for bolt-on installation without modification. Engineered to eliminate suspension play caused by worn factory hardware. Material composition consists of high-strength alloy steel heat-treated to Class 10.9 mechanical properties. Yellow zinc chromate finish provides extended corrosion protection in harsh environments including mud, salt, and moisture. Fully shouldered bolt design ensures precise alignment and reduces unwanted lateral movement in suspension joints compared to partial shoulder factory bolts. Prevailing torque lock nuts maintain clamp load under severe vibration and articulation cycles.