Sheet metal screws are perhaps the most popular or most used screws by industries and households alike. Generally tougher than normal screws, sheet metal screws are threaded from the underside right up to the screw tip. For effective deployment, a preformed hole is usually made in the sheet metal for the screw to twist into.
The type of steel used to manufacture these screws also makes a difference. Common metals used for fabricating sheet metal screws are 304 stainless steel, 18-8 stainless steel, and zinc plated carbon steel. Continue reading