Bolt grade/specification information wanted

[svcguy]

Here is a good link to explain the difference between normal and grade 8 fasteners. It is a nice, easy to understand page for those of us without our engineering degree:

ROCKCRAWLER.com - Grade 5 vs. Grade 8 Fasteners

 

[cityfarma]

Thanks svcguy, that has explained simply what I wanted.

Cityfarma

 

[RedRocker]

Surely the federal government came up with those markings, 3 means 5, 6 means 8 etc. LOL