rare bolt head mark
rare bolt head mark
(OP)
Hi, here's a picture of a broken cap scew involved in an accident. We will call it the "F" bolt. Other bolts around are SS ASTM F593. Unfortunately, this only one does not have a stadard mark and nobody around know about it. Many manufacturer's charts have been viewed and no clue appears.
The question is: What is the bolt grade?
A simple magnetic test showed us a difference, the "F" bolt react to the magnet.
Look at the picture below.
Luc Perron, structural ingineer
The question is: What is the bolt grade?
A simple magnetic test showed us a difference, the "F" bolt react to the magnet.
Look at the picture below.
Luc Perron, structural ingineer
Luc Perron, engineer
Unigec Experts-conseils





RE: rare bolt head mark
RE: rare bolt head mark
RE: rare bolt head mark
The fact that it does not match adjacent fasteners is suspicious, but you can't claim counterfeiting without showing that somebody deliberately represented/sold the bolt in question as being the same as the adjacent fasteners. It could be that it was replaced in the field by somebody (maintenance tech) who didn't know better, or was installed originally by somebody who didn't know better, or because the bolt fell into the (wrong) bolt bin and it never got caught...
RE: rare bolt head mark
KENAT, probably the least qualified checker you'll ever meet...
RE: rare bolt head mark
Likewise, there is no point in making counterfeit bolts with an unknown manufacturer's mark.
RE: rare bolt head mark
RE: rare bolt head mark
RE: rare bolt head mark
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Ted