I'm not a fan of Chinese products in general, but many people keep repeating inaccurate information regarding "Grade 8 bolts from China"And trust me on this one, a chinese grade 8 bolt marking is not accurate.
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.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.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
