Nick Mueller wrote:

Jon Danniken wrote:


While the factory doesn't specify the grade, the nuts they go into
have a six (or possibly a 60) on them.


That's grade 6. Standard is grade 8. The mating strength for a bolt would be
grade 8.8. Grade 10.9 is just a waste of money. Sure, they are more brittle
(they can't be *stretched* as much before they fail) but there is no
construction that requires a *plastic* stretch.

So it is OK.


Nick


I disagree with the "no construction that requires a *plastic* stretch"
part.

That's a common requirement in almost all aircraft construction.


Richard