What supprized me is the lift plate that's bolted to an intake that will support a 500 pound engine with four little 5/16 bolts and nuts.
Those bolts will hold like 5000 lbs each !!!!
Here's a video I made comparing the strength of thread inserts. I did torque tests as well as pull out tests.
Things go *BANG* when they let go with nearly 10,000 lbs of load.
Did you expect an 8mm (close to 5/16") bolt to hold the full capacity of my Horror Freight 20 ton press?
If you want to skip the intro and go straight to the good stuff...
The torque tests start at 5:20.
The pull out tests start at 13:02.
