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What grade is this bolt?

LD50

By LD50,
in The Garage

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Precise1 NPORA Old-Timer

Precise1

Posted
Posted (edited)

Hmm, my machinist handbook doesn't not show that delta1 marking but it only covers SAE and ASTM. :shrug:

Cant find anything on google either, metric fasteners should have a number on the head. I'd assume it's a cheap bolt and replace them.

 

B

 

Wait, does it have 3 lines 120 degrees apart? Hard to tell from your picture... If it does, it's grade 5

Edited by Precise1
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87pathy NPORA Old-Timer

87pathy

Posted
Posted

your all wrong

 

Its a metric equivalent of a machine bolt.

 

its not a grade 5 though, not as good. a metric 8.8 is equivalent to our grade 5. grade 10.9 metric is the equivalent of our grade 8.

 

cheers

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