For Self Starting in thin (0.015-0.050 thick) metal or resin-filled plywood. 18-8 Stainless Steel tapping screws may be used in applications which require general atmospheric corrosion resistance. Fastening stainless steel parts to aluminum or steel can cause a type of corrosion known as galvanic couple in some environments. Self Tapping Screws - Self Tappers - Sheet Metal Screws - for metal to metal and metal to wood applications. Self Tapping screws have the ability of creating its own thread vs. machine screws which require a pre-threaded nut or other female insert. Self-Tapping screws can cut their own threads as the screw is driven in to the material. They function by having a cutting edge which drills away the material, making a tiny hole for the screw to go into. This has nothing to do
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