I was looking through the forum and noticed this topic. I haven’t heard about the “no sheetrock screws” in a long time. Years ago an older electrician (a genius of an electrician at that) that I worked with on occasion told me not to use sheetrock screws because of the metal they were made with. The dissimilar metals between the screws and metal enclosures or boxes would make the area around the hole in the box and the screw rust prematurely and break. How long this would take I don’t know. I just know we couldn’t use sheetrock screws on his projects. Every now and then –such as this post- I hear of this issue and this was the only explanation I was given.
Mic.
