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出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/08/01 01:44 UTC 版)
Self-tapping is the ability of a screw to advance when turned, while creating its own thread. This ability is sometimes created by a gap in the continuity of the thread on the screw. These edges cut a thread as the screw is driven in to the material. The cutting edge drills away the material, leaving a hole for the screw to go into.