Hub is designed for use on axles with agricultural applications. Fits 6,000-lb axles. Inner bearing (506849) and race, outer bearing (501349) and race, grease seal, grease cap, and lug nuts are included. Grease seal, grease cap, bearings, and (8) 5/8"-18 lug nuts are included - races installed in hub For use on spindle part #AS6000F Yellow zinc finish on wheel studs, lug nuts and grease cap help