Aircraft grade bolt have many standards, more to do with
heat-treating and plating and tolerances on the thread and
shank fit and finish. Aircraft hardware is a detailed
study all to itself.



wrote in message
oups.com...
|
| Matt Whiting wrote:
|
|
| Cessna uses a bolt installed in shear through fittings
like
| you fingers meshed. This is called "double shear" and
as
| long as the bolt is a snug fit in the hole the bolt
can hold
| more load than the airplane is designed to experience.
| But a bolt in tension is stronger than a bolt in
shear.
|
| I'd have to pull out my AISC manual to be sure, but I
believe that a
| bolt in double shear has more capacity than in tension.
If you are
| comparing single shear to tension, then I agree with
you.
|
| Matt
|
| That's right. The 70% figure refers to single shear.
|
| I made a mistake on the Grade 8 bolt head marking.
It has six
| radial marks, not five. Five is a Grade 7, not a common
bolt. The
| grades go clear to Grade 16, IIRC.
|
| Dan
|