The Day of Establishment: 2000 The number of workers: 20 Registered Capital: 300,000 Annual Turnover: 9,500,000 Haiyan Tongrun Fastener Factory is locates in the fastener town, Haiyan, known as “The iron sea”. Establishing in 2000, Tongrun Fastener Factory is professional manufacturer and seller of square nuts, especially D-3, DIN557 and DIN734. We can also produce non-standard nuts according to customer’s requests. With cold heading machine, lathe and testing machine, etc. our company’s annual turnover can reach 9 million. Our company has imported High speed cold extrusion molding machine from Taiwan. Now the factory has equipment with 1B-5S，14B-5S，19B-6S， 24B-5S and 33B-5S for manufacturing square nuts. Our main products are D-3(1/4-3/4), DIN557 (M6-M20) and DIN934 (M6-M20) in carbon steel. We can manufacture non-standard nuts according to customers’ picture and Undertake external processing. Our products are mainly used in raiway, machines,and contruction industry. “Quality first, Customers supreme” has always being our company’s operation principle. Haiyan JK Fastener is warmly welcomed by customers in USA, Europe and Southeast Area just because of high quality products and good service. We will adhere to the "honest and trustworthy, quality first" principle to provide our clients with good service. Wlcome you to chat with us.