M14x1.5 thread wheel nut with correct taper for the factory Carat and Atiwe wheels, as well as a lot of aftermarket wheels.
Zinc plated body with stainless steel cap.
When VW fitted Alloy wheels to the T3, they used an unusual (for VW) wheel fitting as they have a tapered seat instead of the normal radius seat.
The reason they did this was to allow enough engagement on the standard length rear studs so vehicles with alloy wheels didn't need longer studs fitting.
This is the reason why, when buying a used set of original T3 Alloy Wheels its always been important to get the original wheel fittings, because the correct ones haven't been available for a long time.
There are a couple of alternatives that we've sold for years for this reason, but none of them are quite "right"... these are very close to the originals in both style and quality.
Sadly nuts are all that are available, so for the front you'll have to use a set of conversion studs (see related items).
They're made in 2 pieces - the body is Zinc plated steel, the cap is stainless. For this reason if there is more than around 23mm of stud left after fitting the wheel, you'll likely pop the cap off the end when fitting.
Fine for standard length studs though, and if your studs are not too long you wont have an issue.