Essbos;c-146226 wroteSpinning on with fingers??
There is likely some small contamination on the threads and due to the acorn design - inside the nuts. Especially when compared to a fresh vw.
If you are regularly removing and installing wheels in dirty or sandy places consider open ended nuts as they will not trap contaminents like a closed end nut will.
Keep in mind usually a nut failure would occur from the nut threads being all wallowed out, not too tight.
Threads look clean apart from the metal fragments that emerge whenever being loosened from the studs. I began using anti seize after I saw this to try and reduce the friction between the studs and nuts.
I do like the open ended design for your reason of letting contaminants escape but also to allow the use of longer studs (ARP reinforced ones that I’ll be getting in this case)
Yeah threads just might be old, worn over the past 27 years. New nuts and studs should solve the problem.
jlfents;c-146228 wroteNot to discourage you from doing your thing, but I don't believe there would be much benefit to having 'hd' nuts. As James said they're designed to be to be torqued to some spec, and that spec should be within their elastic limits. The stretch your referring to would be from ~30 years of use, and have probably been over tightened a whole bunch of times... Considering how hard it is to find the product, it seems to have very limited applications and as you pointed out, they would carry a heavy pricetag.
I’ll probably end up getting another bunch of standard nuts for now. Maybe later I can give some first hand feedback on HD nuts if I ever desire to potentially waste some money.
Cheers for the feedback guys