Kubota-style premium aftermarket nut. Part reference 803-304C. Size/application: Nut Hex Whiz 5/8-11 PLT. 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: Kubota and premium aftermarket systems built to the matching Kubota 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.