Jun 28, 2016 #1 azzt Mechanical May 19, 2004 32 0 0 GB Hi I have a precision steel bolt M10 x 1.25 and it has a raised letter q on the head. I'm fairly sure this is Japanese. Can anyone tell me if this relates to the material strength or is it something else? Thanks in advance allan
Hi I have a precision steel bolt M10 x 1.25 and it has a raised letter q on the head. I'm fairly sure this is Japanese. Can anyone tell me if this relates to the material strength or is it something else? Thanks in advance allan
Jun 28, 2016 #2 SwinnyGG Mechanical Jan 22, 2016 2,550 0 36 US Just a raised letter Q, or are their other markings? (dots, lines, any other shapes or letters) Upvote 0 Downvote
Jun 28, 2016 #3 EdStainless Materials May 20, 2004 15,893 0 36 US There used to be a database of bolt IDs. Though I have been searching and haven't found it. I hope someone with a better memory than mine comes along. I had thought that it was part of a DoD report on bogus fasteners... = = = = = = = = = = = = = = = = = = = = P.E. Metallurgy, Plymouth Tube Upvote 0 Downvote
There used to be a database of bolt IDs. Though I have been searching and haven't found it. I hope someone with a better memory than mine comes along. I had thought that it was part of a DoD report on bogus fasteners... = = = = = = = = = = = = = = = = = = = = P.E. Metallurgy, Plymouth Tube
Jun 28, 2016 #4 SnTMan Mechanical Jan 22, 2005 6,780 0 36 US Ed, I got this from the fora previously, MIL-HDBK-57E. Don't think the OP's maker is listed, but can't say for sure. Regards, Mike The problem with sloppy work is that the supply FAR EXCEEDS the demand http://files.engineering.com/getfile.aspx?folder=928b6563-bedd-4f70-83a4-d09f77a3567a&file=MIL-HDBK-57E.pdf Upvote 0 Downvote
Ed, I got this from the fora previously, MIL-HDBK-57E. Don't think the OP's maker is listed, but can't say for sure. Regards, Mike The problem with sloppy work is that the supply FAR EXCEEDS the demand
Jun 28, 2016 #5 SnTMan Mechanical Jan 22, 2005 6,780 0 36 US Here's another, same source The problem with sloppy work is that the supply FAR EXCEEDS the demand http://files.engineering.com/getfile.aspx?folder=7a21769c-c497-4dc5-acf0-f74c944be284&file=fasteneridentificationguide.pdf Upvote 0 Downvote