Infinity Bolts

[Myumi-2]

I've noticed that most of the frame bolts on my K2 have a symbol on the top which looks a bit like a circle with a line through it, or an '8".  

What does this indicate?

Cheers
Tim

[woodsrider250-2]

It's the grade...Not to be confused with SAE Grade 8 in this case (or any metric for that matter).

http://www.hoyetractor.com/metricbolt.htm

[Myumi-2]

Thanks for that.

Cheers
Tim