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Bolt Head Pattern identification
2

Bolt Head Pattern identification

Bolt Head Pattern identification

(OP)
thread404-241995: Bolt head marking

I looked through the thread above and could not find the attached bolt head in any of the links.  We are asking our nut and bolt suppliers if they know who made this bolt.

A customer of mine found this in their product and are asking their suppliers if we recognize this.

It is <|> with the bottom of these two <| attached and the top of these two |> attached so that it almost looks like a triangularized S on its side.

RE: Bolt Head Pattern identification

Yes the 3 lines means grade 5.  The S mark is something the vendor puts on there, not important imo.

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RE: Bolt Head Pattern identification

(OP)
I knew about the three lines being grade 5.  We're looking for the vendor to prove that we don't buy from them, so this time it is important (at least to us).   

RE: Bolt Head Pattern identification

Well why can't you just check with your purchasing department who they buy them from, then the company who sell them to you might tell you who they buy from if there just a middleman

desertfox

RE: Bolt Head Pattern identification

2
Here is one source of manufacturers' marks. There are all list in the US Patent and Trade Office if sold in the US and I believe Canada as part of the Fastener Quality Act
The markings are trademarks.  

The Mil handbook should be available as a download from DAPS.

You can buy it here.

http://store.mil-standards.com/index.asp?PageAction=VIEWPROD&ProdID=659

RE: Bolt Head Pattern identification

(OP)
Unclesyd, thanks for the help.  I think we found what we needed.  Have a happy holidays.

Kurt.

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