I would think they are the same. I have 3 wheels with the originals and they all have the metric on them which was used on many wheels in the late 80 early 90s cars with "baring nuts" . Could be wrong, but I looked at these every fricken day for 5 years when i worked at a shop and they were all the same. I used to have a bag full of real nice ones but I put them on my 86 z28 and forgot to take them off I was the only one in the shop that kept those. Last I knew dealer wanted like 8 bucks a piece for those things and they fall apart every time an impact hit them. If you like your nuts use your hands, not machines. Ok enough with the jokes. Possible different lengths. I'll check mine out and get back
They are the same. If you tear off the stainless steel dress cap its the same basic nut. The GN has the bulge on the seat to lock down the center cap, is the only difference. And the SS cap. The GN is acorn shaped and the T is flat.
OK, I thought they were a little different. I need to find a set for my T type, almost all of the stainless pieces are off the lugnut. Anybody have any laying around?