How to ID 16" 8 bolt wheels?

hypercycle said:

I guess I need to confirm what the threads on my 1979 k20 4x4 suburban actually are: I assumed 9/16-18; those lug nuts I pictured above seem to be these SAE inner threads with the dual 'outside' threads being in a metric standard M27x 2.0; The center caps I bought are off a 2000 8 bolt ?Silverado? I was trying to see if that was the correct outside thread for those caps. Can't readily find this information online for some reason. Thank you AuroraGirl for also looking. Since I have the caps in hand, I guess I can match up those threads as well and hope the are the M27 x 2.0 so I can move on
Thank you, Pete

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I wasnt clear enough, The plastic black nuts on the caps gmt800 and gmt400, are m27x2.0

If they werent for some reason you can buy new ones and pop them on (they come out), which would be that thread. Then yes you just need to confirm your 79 lug nut threads
Heres the 1979 service manual

hypercycle said:

I guess I need to confirm what the threads on my 1979 k20 4x4 suburban actually are: I assumed 9/16-18; those lug nuts I pictured above seem to be these SAE inner threads with the dual 'outside' threads being in a metric standard M27x 2.0; The center caps I bought are off a 2000 8 bolt ?Silverado? I was trying to see if that was the correct outside thread for those caps. Can't readily find this information online for some reason. Thank you AuroraGirl for also looking. Since I have the caps in hand, I guess I can match up those threads as well and hope the are the M27 x 2.0 so I can move on
Thank you, Pete

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Yeah, those should work just fine. Your studs are 9/16".

HotWheelsBurban said:

Well.... nobody wants them at the swap meets I've had em at in Texas. I had one dude who had the bigger ones on a lifted Blazer, but he didn't want to buy the whole set(and I didn't want to get stuck with two wheels I don't need). I don't want to sell them for scrap either, if someone could use them....

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I'd love to buy them if I could afford it right now. But there's currently no budget for "want" items. There's really not even enough for the "need" items right now, lol.

AuroraGirl said:

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These are fords right?

I ask because I can go shove a dog dish on each one(well I dont own the wheel at the end anymore) the front ones with the hole for the hub locker and the one with the GMC logo
I wonder if the 16.5 wheels had the same size ring , because Im pretty sure my caps are from my truck and my truck had 16.5 from factory.

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These were likely original to a square with 16.5 or my truck specifically (white, would be the original painted wheel color for my trucks color scheme)

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Could be.
They look kinda like what came on my truck.
You would have to look them over to find the stamp to be sure though.

bucket said:

I'd love to buy them if I could afford it right now. But there's currently no budget for "want" items. There's really not even enough for the "need" items right now, lol.

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I totally understand! I'm pretty much in the same boat.....and I don't have any kids to feed (other than the truck which I call my metal kid).
Bad thing about selling anything big or bulky out of state, is what would shipping costs be??

bucket said:

Yeah, those should work just fine. Your studs are 9/16".

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Studs are 9/16", probably takes a 7/8" wrench or socket to tighten/loosen them? 7/8" and 22mm are pretty close. I have a tool Dad made that's basically a nut driver for the lug nuts, with a 22mm socket on it. I used it recently to get the plastic nut covers loose on a center cap I was getting from a truck in the wrecking yard.

HotWheelsBurban said:

Studs are 9/16", probably takes a 7/8" wrench or socket to tighten/loosen them? 7/8" and 22mm are pretty close. I have a tool Dad made that's basically a nut driver for the lug nuts, with a 22mm socket on it. I used it recently to get the plastic nut covers loose on a center cap I was getting from a truck in the wrecking yard.

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That's a great idea! I'm going to weld a screwdriver or something to a socket. I've always used an impact socket, by hand, to remove and install the plastic nuts. Than can be a little hard on the wrist, grasping the end of a socket for all those plastic nuts on an 8-lug truck.

HotWheelsBurban said:

(other than the truck which I call my metal kid)

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ah a metal kid eh his mama must as trve kvlt as one can I have no dout what so ever that she fits in the group some how (hahahaha)

I am pretty shore that you know that I can not pas up on a good metal joke HWB

bucket said:

That's a great idea! I'm going to weld a screwdriver or something to a socket. I've always used an impact socket, by hand, to remove and install the plastic nuts. Than can be a little hard on the wrist, grasping the end of a socket for all those plastic nuts on an 8-lug truck.

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What he made was kind of over engineered, but he was like that about a lotta stuff. It actually has a half inch drive on the end, so you can swap sockets as needed. He had it in the Denali and when we were cleaning it out, I found it and decided it needed to be in my crew cab.
And I agree totally about the #of lug nuts being hard on the wrist and hand; that's why I got a cordless impact gun! I won't use it on the plastic covers unless I'm trying to change a tire on the side of the road, but it definitely makes getting the 8 lug nuts off or back on, much easier and quicker.

bucket said:

That's a great idea! I'm going to weld a screwdriver or something to a socket. I've always used an impact socket, by hand, to remove and install the plastic nuts. Than can be a little hard on the wrist, grasping the end of a socket for all those plastic nuts on an 8-lug truck.

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I put my m18 small milwaukee impact with a 3/4 adapter in the chuck and then use my 22mm deep well impact socket i use to do the lug nuts and spin them off

When installing I just do it slowly.

They are plastic but they are available t o replace , just YOLO it they arent even needed to all go on the entire way, just enough to snug up nicely.

I didnt break any either doing this lol

The plastic ones are cheap for a bulk supply, dont sweat breaking. If anything you can get the marred/faded black , maybe cracked ones replaced with nice dark good looking ones. you could also use a drill if you were worried about using an impact like i did