Re: Getting rid of stainless fasteners
 

From a Grade 8 spec listing:

Screws meet SAE J429. Rockwell hardness is C33-39 with a minimum tensile strength of 150,000 psi. Made of medium-carbon alloy steel that has been quenched and tempered. Screws are grade marked on top of head (six radial lines indicate Grade 8).

Re: Getting rid of stainless fasteners
 

all,
Be careful when buying fasteners. I'm in the defense industry and we were burned badly by a supplier who sold us Mil Spec Grade 8 fasteners with certifications. There is a lot of counterfeit hardware out there that comes from Taiwan and others.
Our bad hardware was destined for use to secure the cannon in the Abrams tank turret.
ed

Re: Getting rid of stainless fasteners
 

Well I odered some socket head ultra coated bolts.

How can I tell where they are made and iff they are up to snuff?

I got them from McMater-Carr as discussed above