Shanghai TopKun Industry Co, Ltd is specialized in manufacturing and exporting standard and non-standard fasteners and hardware with more than 15years's experience.TopKun's Advantages standard Products:(1) Gr.8/Gr.5 Hex Bolt, Gr.8/Gr.5 Hex Flange Bolt, A325 heavy hex bolt, B7 stud bolt, A394 T0/A394 T1 Tower Bolt, Step Bolt, T bolt (2) Hex Nut, A194 Gr.2H Heavy Hex Nut, A563 Gr.A/C/DH Heavy Hex Nut(3) F436 Harden Washer, TopKun's goal is 5G:G- supplying good quality productsG- supplying good pricesG- supplying good delivery timeG- supplying good serviceG- To be good friends TopKun keeps working hard to make it easy for our clients to reduce the cost!