Self Tapping And Drilling and Wood Screws - Slotted CSK ...
DIN-7504K. A self-tapping screw is a screw which can tap its own hole as it is driven into the material. Common features are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended substrate, often case-hardened. A Self-Drilling Screw is a Self-Tapping Screw …
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