QJ shows up in places but it's never explained what it means when it does.
BOLT 5131014179 QJ 4.8
Metric Grade 4.8 is the key information.
looking at those bolts I would say that could well be it.
in "graded" metric bolts only 4.6 is lower - ands they are DEFINITELY not Stainless - - -
"
Thanks for all the kind help from all you wonderful folks. You were all right. The seller lied to me about the bolts.
I left the bolts outside in the rain and they rusted already.
Suitable for a car perhaps. Or maybe only indoors. I don't know but they rusted already outdoors in the rain.
They're no good for outdoor use for an outdoor pole light as by the time I need to take it down, they'll be rusted up.
Ever been there before?
Definitely NOT suitable for the majority of automotive uses. Giood for cheap furniture if you paint it.
Oh yes!!! I bet that we all have been there before. Thank you for following up with the photo. I started using SS fasteners years ago for many things, but not all. Each metal and alloy has different properties and uses.
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