Komatsu-style premium aftermarket nut. Part reference 1987121911. Size/application: Komatsu Nut. Use with the bolt having the identical diameter, thread pitch and seat; matching bolt reference depends on the application. High-strength replacement hardware for the specified plow, track or structural fastening system. 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 thread and nut-seat style before installation.