High strength bolt testing and marking Q&A

A. Hi Alex. Sorry but there are many thousands of specs and standards and I have no need for that spec, so I don't have it. You've indicated that you are a student and those specs can be prohibitively expensive for student papers, so if any reader can help you, I hope they do!

But if you are interning, that's a whole different matter. If your company has accepted or is bidding upon a contract calling for ISO-898-1 fasteners, they absolutely must obtain that spec for themselves, not rely on anyone's interpretation or summary of it.

Luck & Regards,

Hi Mohamed. The marking is for essentially the same reason as for labeling anything else in the world: so people know what it is -- grade 8.8 high strength bolt -- and who has certified that it is what it is marked (the manufacturer's symbol). The markings are deliberately raised rather than depressed because that makes forgery substantially harder (unlike stamped letering, raised letters can essentially only be done at the time of manufacture).

Certainly it is not necessary to label all hardware -- every hardware store in the world has shelves full of unlabeled bolts -- but it could be a life-threatening disaster if those hardware store bolts were used where high strength grade 8.8 bolts are needed. If the contract called for grade 8.8 bolts, I think you're not going to find supporting material that labeling is not a necessary part of the 8.8 standard. Good luck.

Regards,

A. Sorry, Mohamed, but while I'd like to continue trying to help, you absolutely must not lob the requirements for standards compliance into someone else's court :-)

You are offering products that are required to comply with standards, and you absolutely must obtain those standards yourself and assure for yourself that you are in full compliance; you cannot rely on someone's else's summary of the requirements. Good luck.

Regards,