I have a 04, 3500 4X4, with steel 16" wheels, 8 lug. The hubcaps have 8 plastic threaded lug nuts, that attach it to the wheel. I had to replace one of them, and it cost $5.00. Let's see, that's 32 plastic nuts @ $5 each= $160 for hubcap nuts. I hope I never have to replace a hubcap.