mechanicalengineering.net
Engineers look up standards, material properties and formulas constantly, and the sites serving that need are mostly terrible. A reference resource is the most practical use of this name and the most defensible.
Mechanical engineering is one of the largest and oldest engineering disciplines, taught in every technical university on earth and practised in every manufacturing economy. The term is unambiguous and unchanging, with no alternative phrasing competing with it.
Beyond reference it suits an education resource, a careers platform, a professional community, or a supplier directory.
The .net has a specific advantage: it reads as a network or resource rather than a company, which is right for a community or reference site, and it keeps a long exact-match keyword accessible.
Two words, no hyphen, the exact phrase students, practitioners and recruiters all use.
Available now. Enquiries welcome.