Shanghai TopKun Industry Co, Ltd is specialized in manufacturing and exporting standard and non-standard fasteners and hardware with more than 15years’s experience.Our factory Ningbo Yueli High-strength Fastener Manufacture Co.,Ltd., is located in the famous port city of Ningbo -Jiulong Lake , Zhenhai. Maily manutacture high strength bolts which widely used in steel structral, Metal Buliding, Oil& Gas, Tower & Pole etc.the products we mainly manutactured including SAE J429 Gr.8/Gr.5 Hex bolts/hex cap screw, Heavy hex bolts ASTM A325/A490/A307, Stud bolt A193 Gr.B7, B7M etc.In order to meet most of our clients’ ONE-STOP SHOPPING demand, we built the office Shanghai TopKun Industry Co, Ltd in Shanghai on 2009,Topkun not only export the hign strength bolts we manufactured but also built a sourcing team, now we enjoyed very good relationships with a lot of factories in China. in fastener and hardware area, so we can offer our customers very good price not only for the products we manufacturing by ourselves, but also for the items which we sourcing from our good cooperated factories.