The accurate definition shall be: non-standard special-type fasteners. With the common use of the fastener forming process from cutting processing, hot forging processing to cold upsetting process, a variety of industrial application needs that the existing standard fasteners cannot meet have become the motivation for the development of non-standard special fasteners. The cold heading process such as feeding-extrusion compression diameter-pier step-optical punching molding, and two-mode cold-stroke machine on line brush parts, four-station cold-heading machine, machining of special nuts are widely used in engineering pump truck, pipe connection and special machinery.1. We attained ISO9001 which provides solid foundation for our further development. Persisting in "High quality, Prompt Delivery, Competitive Price", we have established long-term cooperation with clients from both overseas and domestically and get new and old clients' high comments. It is our great honor to meet your demands. We are sincerely expecting your attention. 2. Our company has built stable business relationships with many well-known domestic companies as well as oversea customers. With the goal of providing high quality products to customers, we are committed to improving its capacities in research, development, manufacturing and management. We have honored to receive recognition from our customers. Till now we have passed ISO9001 in 2005. Enterprises of "quality of survival, the credibility of development" for the purpose, sincerely welcome domestic and foreign businessmen to visit to discuss cooperation. 3. Tiancong has complete production machines, advanced testing technology, experienced technical engineer team, and strict quality control system, providing all-weather service. We have a group of professional technical engineers team who can support you on how to choose the right fastener or design new fasteners. And our experienced production-line workers guarantee processing strictly in accordance with customer requirement. We have more thar 30 years of professional manufacturinc experience in fastener industry.