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A large-scale pipe thread tool manufacturer in Asia, and also a production enterprise that has adopted advanced cold and hot processing technology according to national standards to produce various grinding taps in recent years. The factory was established in 1974 and is a successful example of the transformation of military enterprises.

The establishment of a "dual station" enterprise for postdoctoral research workstations and academician workstations, representing international advanced technology in nanomachinery, internationally advanced thread processing equipment systems and fully CNC and automated tap production lines produced in Germany and Switzerland, as well as the effective operation of a sound ISO9001 quality management system, ensure excellent and stable product quality.

The "Langgong Brand" thread tool products include British standard, American standard, German standard pipe thread taps, metric thread taps, spiral groove taps, extrusion taps, screw tip taps, die plates and special measuring tools, gauges and other specialized equipment related to thread processing, with a total of more than ten categories, more than 200 varieties, and more than 2000 specifications

Widely used in industries such as Magang, ductile iron and stainless steel fittings, valves, building steel pipe connections, oil and gas extraction, fire-fighting equipment, pressure vessels, automobiles, machine tool manufacturing, bridges, standard parts, and other related industries that use threaded connections, exported to Asia, Europe, North and South America, and other international markets