Originally Posted by
vikingivesterled
But what if in the confusion of bolt definition they used an available fully threaded bolt (called set screw (with no head they are called grub screw)) instead of one only partially threaded (just called bolt). How much would that reduce the shear strength. And in this case it's bending and hitting/pushing on the middle by the roller pins strength we are talking about, not pull strength.
(Definitions on bolt type names are from the website of the supplier of stainless steel hardware inox.ie)
This could also have been done by a Spirit employee and especially if they thoght Boeing routinely would replace them later.
They could even have used non hardened bolts.
I could attribute many potential issues to Boeing and/or Spirit. But not knowing the difference between a bolt and a set screw isn't one of them.