JEEP WRANGLER YJ/TJ 87-02 SKID PLATE NUTSERTS RIVNUTS COMPLETE SET. Includes all 6 skid plate nutserts: These are zinc plated which are much more rust resistant than standard steel. These are the correct (original) inside diameter and thread pitch. To repair damaged, rusted or spinning nutserts in the frame. Includes all 6 skid plate mounting bolts: Includes 6 hardened flat washers and 6 conical centering washers. Bolts are Grade 8 which are stronger and much more rust resistant than standard (Grade 5) bolts. Bolts are the correct (original) length, diameter and thread pitch.