[Theo Crabalar]

I didn't see SVI, Staccato (former STI) or KE Arms in this thread.
They manufacture everything in the US, but I can't say for certain whether or not they get all the raw materials from the US.

 

[mkk41]

Our main steel supplier is Pennsylvania Steel Company, Inc. - Northeast Steel Distribution (pasteel.com)

They claim to supply as much US produced steel as they can. Exactly how much is domestically produced and how much is imported?
I'm sure a few pundits here will know!

 

[desmodue]

And trust me on this one, a chinese grade 8 bolt marking is not accurate.

I'm not a fan of Chinese products in general, but many people keep repeating inaccurate information regarding "Grade 8 bolts from China"

ASTM Grade 8 bolts can be made in any country, as long as they are made to the specifications set by ASTM/ASME. But it's uncommon to see them made outside North America or UK.

The rest of the world tends to manufacture fasteners to the European standard; DIN.
When you see a bolt with 8.8 marked on the head, it isn't an ASTM Grade 8 bolt. It's a DIN Grade 8.8 which is roughly the same as an ASTM Grade 2 bolt. It's a perfectly good bolt for swingsets, lawn furniture or fence gate hinges. The Din equivalent for an ASTM Grade 8 would be DIN 10.9

 

[mkk41]

I'm not a fan of Chinese products in general, but many people keep repeating inaccurate information regarding "Grade 8 bolts from China"

ASTM Grade 8 bolts can be made in any country, as long as they are made to the specifications set by ASTM/ASME. But it's uncommon to see them made outside North America or UK.

The rest of the world tends to manufacture fasteners to the European standard; DIN.
When you see a bolt with 8.8 marked on the head, it isn't an ASTM Grade 8 bolt. It's a DIN Grade 8.8 which is roughly the same as an ASTM Grade 2 bolt. It's a perfectly good bolt for swingsets, lawn furniture or fence gate hinges. The Din equivalent for an ASTM Grade 8 would be DIN 10.9

It's been my observation that only metric bolts are marked with DIN numbers. SAE/USS bolts are still marked with Grade ''lines'' on the head.

 

[Srgunner]

I had snowplow blades falling off due to those 10.9 marked bolts failing. A bunch of them. County Highway superintendant found a "deal" on bolts. At the time I could easily go through 50+ bolts in a shift as we did not reuse them when changing a blade. This was 1995-2000. Who knows what they were. But they were bought and marked as a grade 8 equivelent.

 

[wildphil]

I'm not a fan of Chinese products in general, but many people keep repeating inaccurate information regarding "Grade 8 bolts from China"

ASTM Grade 8 bolts can be made in any country, as long as they are made to the specifications set by ASTM/ASME. But it's uncommon to see them made outside North America or UK.

The rest of the world tends to manufacture fasteners to the European standard; DIN.
When you see a bolt with 8.8 marked on the head, it isn't an ASTM Grade 8 bolt. It's a DIN Grade 8.8 which is roughly the same as an ASTM Grade 2 bolt. It's a perfectly good bolt for swingsets, lawn furniture or fence gate hinges. The Din equivalent for an ASTM Grade 8 would be DIN 10.9

I think the grade 8.8 strength is closer to the grade 5 strength. But I see the point that you are making.