This is what I'm running.
http://rides.webshots.com/photo/2731701030092261295ROodmu It's a center for a '94-'98 1/2 ton 4x4 with the screw on nut covers. How I did it is a little more involved than what others have done, as I'm running 1/2" studs instead of 7/17". I found the nuts, 7/8"hex with 1/2" threads, at a swap meet, just 1 vendor down from the caps. Unfortunatly, I didn't get the source of the nuts. It did require slight modification of the wheel, as the seat area for the nuts was a little small for that nut. I only had to re-machine the seat a little to increase the size, using a 60 degree 3 flute countersink bit. I know that y'all are thinking "What?!!, he replaced studs just to get the caps?!!". Actually, I'd already swapped out the studs, and had intended on a different wheel (6 lug 'Vette Ralley), but got a good deal on the Blazer Ralleys, the caps and nuts were just a lucky find. I had originally replaced the studs just simply because I've seen to many of the smaller studs break, namely due to overtightening, and I just prefer the extra strength of the 1/2" studs. Wasn't too hard to do, just cross referenced the knurl size from the OE to the thrad size I wanted. OK, I cheated. I have my own copies of both Napa and Dorman stud/nut catalogs, something the average 'Bolter won't have. But feel free to pick my brain if you need a stud/nut number, I'll look it up. Then you can watch the look on the face of the kid at the flaps when you just give him the part # instead of making him figure it out!
