Zhejiang Zhongyuan Wanying Thread Technology Co., Ltd/Ningbo Henghui Thread Tools Co., Ltd. established in 2005, located in Fenghua District Ningbo.The predecessor is Yinzhou Hengli Thread Tools Factory, established in 1993. Our company specializes in the Design and Manufacture Customized High-Precision, High-Tensile Thread Rolling Dies from the begining .Right now,we have more than 140 staffs,50 Mu,over 26000 square meters’ production base with convenient transportation. Annual production capacity of 1500 tons.More than 500 types dies daily in stock.Top rank in the this field. In the process of stable development and continuous innovation, our company has established a firm and clear quality concept, paid attention to training various professional talents, constantly introduced advanced manufacturing equipment and testing instruments, attached great importance to product quality management, and never ignored any details in the product production chain. With the increasingly perfect manufacturing process and perfect testing means, the products have won the trust of customers and are sold all over the world. Cr12MoV and SKH9 high-quality steel are selected as the Cylindrical thread rolling dies of our company. Good at designing and manufacturing various special difficult Thread roller. Metric,Whitworth,Unified,Worm, ACME/Trapezoidal,Knurling,NPT,spline,cube,and etc ,All kinds of thread can be manufactured. Our Flat Thread Rolling Dies are made of DC53 and SKH9 high-quality steel. Good at designing and manufacturing various special difficult Rolling dies plate. Metric,Whitworth,Unified,Worm, ACME/Trapezoidal,Knurling,NPT,wooden screw,Self tapping,Drywall,Self drilling,spline,cube,and etc.All kinds of thread can be manufactured, Customized Metric,Whitworth,Unified,Worm, ACME/Trapezoidal,Knurling,NPT,wooden screw,Self tapping,Drywall,Self drilling,spline,cube,and etc ,all kinds of Thread we can make . Flat& Cylindrical thread rolling dies are made of Cr12MoV, DC53 and SKH9 (high speed tool steel).