Manufacturers list of bolt head markings with addresses

[heinz57]

Sorry for long access route to this pdf, but the 22 page file is too big to download here. Copy and paste this link in the search bar, then click on the Electronic Fastners site. This pdf even includes the manufacturers addresses.
northamericanmfgidentificationmarkings.pdf

[bcmiller]

I am not sure if we already have something like this, if not then I will check with Kurt and maybe we will link it somewhere.

Thank you.

[Petes L48]

We did have an old thread on this topic going years ago:

http://www.camaros.org/forum/index.php?topic=9074.0

[Delco115]

See the North American manufactures ID markings here >>>> https://www.electronicfasteners.com/wp-content/uploads/2014/09/northamericanmfgidentificationmarkings.pdf

[Petes L48]

I wonder if that linked PDF is just active manufacturers as-of the 2014 date in the link, or an "all-time" list of both active and inactive manufacturers.