Komatsu-style premium aftermarket hexagonal bolt. Part reference 20Y-27-11560. Size/application: Bolt M18 x 45mm. Use a matching M18x45 high-strength nut; the exact nut reference is not listed in this catalog. General heavy-equipment fastening hardware for the matching assembly. Brand compatibility: Komatsu and premium aftermarket systems built to the matching Komatsu specification. Standardized dimensions may also fit other major brands when diameter, thread, length and seat are identical. Confirm strength grade, thread pitch and installed length.