Pan heads are slightly rounded with short vertical sides. Square drive, also referred to as a Robertson drive, are self-centering, reduce cam out, stop a power tool when set, and can be removed if painted over or old and rusty. In industry, they speed up production and reduce product damage. Sheet metal screws have large threads for use in sheet metal, plastic, fiberglass, or wood.
Pan heads are slightly rounded with short vertical sides. Square drive, also referred to as a Robertson drive, are self-centering, reduce cam out, stop a power tool when set, and can be removed if painted over or old and rus...
