O.k. so we have 3 candidates for materials which have (almost certainly) been used, lets say in the last 10 years for formula 1 wheelnuts, they bein':
That something we can all agree on?
As far as I can see Ally still has the most doubt hanging over (including from me to a point) it so allow me to pose this-
If the nuts have this quick action anti undo mechanism as shown in some photo's surely they would need hardly any torque at all once in contact with the wheel? Provided the wheel was firmly pressed against the hub when the nut is fitted it only needs to be nipped up, the tension required against the thread to prevent loosening is unnecessary because it will not loosen until the centre pin of the release mechanism is depressed???
Then it's cornering forces we are worried about, which, taking into account the combined surface area on three/four threads on a nut that diameter would possibly allow the use of a high quality aluminium alloy with an anti gaul thread coating provided the wheel is very well braced against all other movement (which it will be) apart from londitudinally along the stub axle.
Then all 3 are possible? and indeed have been used?
As for Jordan using 1kg wheel nuts, good grief.