Special deformed steel bar for export

Short Description:

A spiral shaped continuous convex part with a specific section made on the surface of a cylindrical or conical matrix. Threads are divided into cylindrical threads and conical threads according to their parent shape; It can be divided into external thread and internal thread according to its position in the parent body, and can be divided into triangular thread, rectangular thread, trapezoidal thread, serrated thread and other special shape threads according to its section shape (tooth shape).