Self-tapping screws are used for thin sheet metal (steel, saws etc.) connections. Self-tapping screws are used for thin sheet metal (steel, saws etc.) connections. Connection, the first being a thread bottom connector system, and then tapping screw is screwed into the threaded connector in the bottom. As the self-tapping screw thread surface has a high hardness (≥ HRC45), can be connected pieces ...
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