Caterpillar-style premium aftermarket track-shoe bolt. Part reference 9X6385. Size/application: Bolt M30x3.5×200. Corresponding track nut reference: 8C8722. High-strength undercarriage fastener for the specified track-shoe assembly. Brand compatibility: Caterpillar and premium aftermarket systems built to the matching Caterpillar specification. Match thread, shank length and machine model before installation.