I agree with you...but since one week i loocking for bolts and nut..
But..you dont think M8 bolts from everywhere are the same grades??
The best i want is to find these bolts and nut on aircraft spuce..
On my 912 80 hp ..i dont have thread in prop flange..so ..i need nylon nut.
I was angry to dosent find any precise information, like a plan with all i need..
Like you said.. propeller it's a critycal part..😩
I send a email to ivoprop to ship me some bolts and nut but he send me back im not in there computer ?????
I will re try to order from ivoprop..and i will try to have Ã* REAL view of the installations ( mouting bolts, washer,..ect)

Thank's again JIM,Dave, Avid