Self Tapping Screws

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Self-tapping screws are a type of fastener that can create their own threads as they are driven into material. They are also known as metal screws, sheet metal screws, or tapper screws. Self-tapping screws are used to create threads in soft materials, such as plastic, wood, and metal, excluding wood screws.

Self-tapping screws come in two main categories: Thread-Forming and Thread-Cutting. Thread-Forming screws have a flat base, while Thread-Cutting screws have a sharp point. Self-tapping screws can be used when:

It's impossible to tap a hole because the material is too thin You don't have access from the rear to install a nut You need to disassemble to object later on, therefore a rivet won't work

Self-tapping screws are different from self-drilling screws, which can drill a hole into anything from metal to wood meaning no pilot hole is needed. Self-tapping screws cannot be used without a pilot hole being drilled beforehand.