The fastener incorporates two or three loosely wound loosely wound thread-cutting blade-like helical projections (5) extending radially from a solid axial core (2).
该紧固件具有两个或三个切削松卷螺纹的刀状突起(5)，该刀状突起从实心的中轴(2)向外放射状延伸。
2
There are generally three methods of threadcutting feed:straight cutting method, oblique cutting method and both sides cutting method.
螺纹切削的进刀方法一般有三种：直进法、斜进法和左右切削法。
3
Hangzhou zhejiang work tool co., LTD. Is a industry and trade into an organic one, is the largest professional production company of threadcutting tools.