Threading is one of the most universal, yet complicated machining methods. Taps and dies are the major tools for threading. Taps are for outer threads and dies for inner threads. There are two major kinds of taps including straight flute taps, spiral taps, spiral pointed taps, thread formed taps. About dies, circular screwing dies are popular but hexagonal dies still used in some place.

    ZHNENYUAN  tools Co., Ltd can provide different kinds of taps and dies as well as relative accessories. Most of them are made of Alloy tool steel, HSS or HSS-Co,  few of them are made of solid carbide for special purpose.