This article was updated May 25, 2023. It was originally published Nov. 17, 2009. To put hard, durable threaded holes in plastics, engineers often specify threaded metal inserts that will securely ...

Every step of this intricate process turns a simple stainless steel nut into a fully functional adjustable wrench. Precision milling, careful shaping, and expert assembly refine each component with ...

He noticed that some of his samples didn’t rust and were difficult to etch. These alloys contained around 13% chromium. The first application of these steels was in cutlery for which Sheffield ...