I'm just trying to make the logo easy to attach, customizable branding in the future for other product lines and I had a discussion with some of the designers, they're playing safe with gears to symbolizing of machinery and manufacturing.
so I think the biggest restraints are the lack of information from contest brief about your business, premium steels and tubular products (a custom oil pipeline or high quality sockets, bolt, electronic parts, etc) and what the keywords, since I can't find anything literal information in Google.
maybe you can attach few ideas, logo example of like or dislike, and maybe your competitor list to make it difference.
Thanks