Comments on: Fastener Head Markings Decoded http://www.portlandbolt.com/faqs/fastener-head-markings-decoded Portland Bolt's Frequently Asked Questions Sun, 23 Oct 2011 10:20:33 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Jonathan Waltner http://www.portlandbolt.com/faqs/fastener-head-markings-decoded/comment-page-1#comment-4217 Jonathan Waltner Mon, 09 Aug 2010 17:15:11 +0000 http://www.portlandbolt.com/wordpress/fastener-head-markings-decoded#comment-4217 @Jess Elliott - That sounds like a manufacturer's head stamp. For example, our grade 5 bolts look like the image above. The US Patent and Trademark Office has a long list of <a href="http://www.uspto.gov/trademarks/law/FQA_Registry.pdf">registered manufacturer head insignia</a>. You might take a look at it and see if any of them match the markings on your bolt. @Jess Elliott – That sounds like a manufacturer’s head stamp. For example, our grade 5 bolts look like the image above.

The US Patent and Trademark Office has a long list of registered manufacturer head insignia. You might take a look at it and see if any of them match the markings on your bolt.

]]> By: Jess Elliott http://www.portlandbolt.com/faqs/fastener-head-markings-decoded/comment-page-1#comment-4036 Jess Elliott Wed, 28 Jul 2010 19:16:28 +0000 http://www.portlandbolt.com/wordpress/fastener-head-markings-decoded#comment-4036 We recently received HHCS with "SJ" in addition to the normal three, grade 5 hash marks. What does the "SJ" mean? Is it manufacturer or a foreign source material standard? Regards, Jess We recently received HHCS with “SJ” in addition to the normal three, grade 5 hash marks.

What does the “SJ” mean? Is it manufacturer or a foreign source material standard?

Regards,
Jess

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