How to tell what grade bolt you're looking at [Archive]

View Full Version : How to tell what grade bolt you're looking at

sbctols1

07-21-2009, 10:48 PM

Count the dashes on the head of the bolt and add two. If there is three dashes then its a grade five. You get the drift. Not sure if this is something that everyone knows but thought I would share.

dand355

07-21-2009, 11:26 PM

shareings good.... thanks

Diabolical

07-22-2009, 01:01 AM

Great info.. Keep it coming :)

85cam

07-22-2009, 11:42 AM

What if it has 8 dashes around the top
Or how bout them bolts with none at all?

sbctols1

07-22-2009, 12:57 PM

This should help...

http://www.americanfastener.com/technical/grade_markings_steel.asp

Mad Max

07-22-2009, 04:53 PM

The ones with nothing on them break easy...:cool4:

sbctols1

07-22-2009, 05:49 PM

The ones with nothing on them break easy...:cool4:

Aint that the truth.

*hotrods*

11-02-2009, 12:22 AM

Thanks for the info its very helpful

fastman14609

07-21-2011, 05:13 PM

thxs thats great. just printed that link out.

TheLuv

07-27-2011, 09:37 AM

Also factory made locking nuts will have a dot or small round indention on the side of it and I hate em'.

blazaboy86

09-26-2011, 03:43 PM

Is grade 8 the best next to ARP?