Quote:
Originally Posted by Stretch
It was just one of those bolts that I undid and noticed that the strength was higher than the normal 8.8 that you find embossed on the heads of most of the bolts on a W123 / W201
8.8 seems to be "standard" or "a standard" high tensile requirement for most automotive manufacturers (metric fasteners). But sometimes certain things get a higher strength grade spec.
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It looks like this IS an across the ocean nomenclature situation..
Grade 5 vs Grade 8 Fasteners - TineLok
'''Getting back to the original question, “which fastener grade should I use?” We hope it’s very clear by now that grade 8 fasteners are far superior to grade 5 fasteners. If this is so, then why do the automotive manufacturers use some grade 5 fasteners? The automotive OEM’s use what it needs to be safe and nothing more since there is a difference in cost between grade 5 and grade 8 (or metric 8.8 and 10.9). Since the OEM’s manufacture millions of vehicles each year, the difference in a few cents per fastener adds up to a lot for them.'''