Picked up what looks to be a wheel adaptor for a "Bling" type wheel . . . I think.... Grabbed it for making a potential jig. A chunk of billet is always handy. Anyway, curious as to what it goes to. 4 1/2" by 4 on the part that bolts to the hub. 6" x 5 where the studs for the wheel install. It coulda been metric, but the inch measuring works out on the money. 3/4" thick fwiw.
Not sure I've ever heard of wheels with 6" x 5 bolt pattern. I think the smaller pattern was used on some Fords.