Quick question: wheel studs and nuts

[cwk]

A quick question for one of you experts out there.....

I've had new uprights fitted and was checking the wheel nuts were torqued correctly last night. I set the torque wrench to 80lb-ft as advised, and managed to strip the thread in the nut. The studs on the hub look too short to me - they take up about 75% (?) of the thread on the nut, which is quite long.

I've looked on t'internet and have come across 2 conflicting theories

1. The bolt should protrude from the nut by a couple of threads, or
2. As long as the nut engages by more than the diameter of the bolt (if you see what I mean!?), it's OK.

Please, please, can anyone advise me on this one?

Many thanks

Charles

[tr7v8]

My aircraft training is it must protrude by more than 2 complete threads. If it's only in the nut 75% then that's why it stripped. That torque figure is quite high as well. Most M12 wheel nuts are around the 63ft/lbs mark.

Edited by tr7v8 on Thursday 17th May 10:15

[cwk]

tr7v8 said:

My aircraft training is it must protrude by more than 2 complete threads. If it's only in the nut 75% then that's why it stripped. That torque figure is quite high as well. Most M12 wheel nuts are around the 63ft/lbs mark.

Edited by tr7v8 on Thursday 17th May 10:15

Thanks Jim. I have to say the 2 threads theory "sounds right" to me. Looks it too, for what that's worth!!
I found the torque figure on the web and yes, it does sound high. I'll try the 63ft.lb tonight and see how it goes. Luckily, I have several spares

Anyone else?