Bolt with "10" on the head

[bcp]

It's an alien bolt from somewhere around Jupiter.

IO



Bruce

 

[Rock knocker]

I'll go out on a limb and recommend Grade 8

It's probably a metric bolt :laughing:

 

[ovrszd]

That was my plan.
It holds the "down angled part" that the front wheel attaches to, to the main axle.

Oh yeah, definitely Grade 8.

Might be an area you will have to check often to make sure they don't back out again.

Or not knowing how many hours are on your machine, maybe they were never properly tightened??

 

[ovrszd]

It's probably a metric bolt :laughing:

Certainly a metric bolt, think we've established that already. Now concerned with hardness.

 

[Rock knocker]

Certainly a metric bolt, think we've established that already. Now concerned with hardness.

And there is no such beast as a metric grade 8

 

[ovrszd]

And there is no such beast as a metric grade 8

Called it whatever you like. So since you know there isn't what do they call a hardened metric bolt? I believe that's what he needs. Enlighten us.

 

[Rock knocker]

Called it whatever you like. So since you know there isn't what do they call a hardened metric bolt? I believe that's what he needs. Enlighten us.

.....

 

[bcp]

Metric bolt numbers are the actual strength and yield.

From:
Metric System & Specifications | Fastenal



Bruce

 

[bcp]

I found this showing equivalents:


US Grade 2 = approx metric property class 5.8
US Grade 5 = approx metric property class 8.8
US Grade 8= approx metric property class 10.9


Bruce

 

[Agvg]

But the Japanese have their own system, there are no pure 10 in std metric markings.