Genuine Dexter 5 on 4 1/2 Lug Trailer Hub 3500# Axle Complete Kit Wheel Idler (824805-KIT)

This is everything you need, except the axle nut or washer, cotter pin, (they dont wear out, and can be re-used) 

This hub fits a standard 3500 pound axle, either spring type, or "torflex".  Bolt pattern is 5 bolt on a 4-1/2"  inch bolt circle used on many trailers. Studs are standard 1/2"-20 thread.