![]() Self-tapping screws of the round head variety are used for heavy-duty work with thick sheet metal and are available in diameters from 1/4 inch to 2 inches and in lengths from 1/8 to 3/4 inch. They are available in diameters from 3/16 inch to 11/4 inches. Partial-tapping round head screws have finer threads they can be used in soft or hard metals. Both types of pan head screws are available with either plain or Phillips-head slots. Blunt pan head screws are used for heavier sheet metal they are available in gauges from 4 to 14 and lengths from 1/4 inch to 2 inches. Pointed pan heads are used in light sheet metal. Pointed pan head screws are coarse-threaded they are available in gauges from 4 to 14 and lengths from 1/4 inch to 2 inches. ![]() There are several different types of sheet metal screws. Sheet metal screws form threads in the metal as they are installed. ![]() Use this type of screw to fasten pieces of metal together.
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