| 摘要 |
<p>The self-tapping screw-in body has an outer surface, which is partially curved or bent in the threaded area, and have a thread, which is interrupted by a flute and which has a thread crest profile inclined in the advancing direction. The cutting edge formed between the flute and the thread crest is moved to the side of the thread crest opposite the advancing direction, or the helix direction or direction of twist of the flute runs opposite the direction of twist of the thread. The helix angle or angle of twist of the flute is greater than the lead angle of the thread.</p> |
