re 'other factors' ..
the exact ,perfect, perfect.  rear wheel studs ..
that come in two lengths ..
are Porsche 911 parts.
When I have gotten them from a Porsche dealer...they were about
..probably now 15 bucks each.

here's all the ways rear wheel studs can be wrong that I've seen :

the shank is too long, sticks out of the flange, and the wheel gets
stuck on it..very common almost.
the stud does not jam/press fit in the flange properly.
the stud is too long, leaving too many threads exposed outboard of the
nut. ( what's wrong with that, right ?  lol )
the stud is not quite long enough ..

the one time I bought studs for under 2 bucks each ..
they were really not precisely exactly right.
not even close really.

On 3/13/2014 2:06 PM, Ralph Meyermann wrote:
> The bolts and nuts came with the wheels I got from GW. The nuts seem to be
> 15-18mm deep.
>
> Velma 82 1.9L AAZ TD Westy
> On Mar 13, 2014 1:54 PM, "Dick Wong" <sailingfc@dslextreme.com> wrote:
>
>> I have no issue with exceptions to the rule.  I'm sure VW has done their
>> homework.
>>
>> Other factors to consider when fastening parts with nuts and bolts: Cut or
>> rolled threads, grade of the nut and bolt, thread pitch, material type.
>>
>> -Dick-
>>
>>
>> On Thu, Mar 13, 2014 at 11:09 AM, mark drillock <mdrillock@cox.net> wrote:
>>
>>> Rule of thumb aside, on factory alloy wheels VW used nuts that didn't
>>> even come close to meeting your "stud is flush or protruding" goal. A
>>> mere 7+ threads was deemed sufficient by one of the worlds largest and
>>> most successful car maker.
>>>
>>> Mark
>>>
>>>
>>>
>>> Dick Wong wrote:
>>>
>>>> General rule of thumb for bolt to nut engagement:  From a strength
>>>> standpoint, the minimum length of thread engagement should be at least
>> the
>>>> diameter of the bolt.  For a 14mm x 1.5 lugnut/lugbolt, you should go
>> for
>>>> 14mm of engagement.  If you can't measure the available thread length,
>> you
>>>> can calculate the minimum number of turns needed by knowing the thread
>>>> pitch.  In our case, the thread pitch is 1.5mm per thread.  The nominal
>>>> bolt diameter is 14mm, therefore 14mm/1.5mm per thread = 9.3 threads.
>>   And
>>>> since there is one thread engagement for each turn, the minimum number
>> of
>>>> turns is 9.3 for the nut/bolt engagement.
>>>>
>>>> In the case of a lugbolt engaging into the brake drum, if the drum wall
>>>> thickness is less than the bolt diameter, there is no further strength
>>>> gain
>>>> by going beyond the depth of the available threads.
>>>>
>>>> If nothing else for a nut on a stud, make sure the stud is flush or
>>>> protruding from the top of the nut.
>>>>
>>>>
>>>>