what grade is this bolt? never seen one like this

[z28rich]

so what is it

[z28rich]

after looking Im sure its a grade 5.   

[Mike S]

Looks like a grade 5 (it was 3 lines)

Mike

[tmodel66]

I think that's a name on it and 1 hash mark making it a grade 3.

[Mike S]

 Looks 5 to me. I see KSFC (a current bolt mfg) with a line on each side.

Mike

[1968 Z28]

Looks 5 to me. I see KSFC (a current bolt mfg) with a line on each side.

Mike

Yup.....X3

[x77-69z28]

5

[tmodel66]

I think that's a name on it and 1 hash mark making it a grade 3.

I agree it's a 5 now that I can see it better. I was on my brothers tablet and the picture was too little. They brought my laptop to this morning.