Hexagon nuts, screws, bolts, screws cooperate with each other, play the role of connecting fastening parts. Divfine and coarse teeth, English and American system. Common criteria are: GB52, GB6170, GB6172, and DIN934. General national standards and German standards are represented by M (such as M8, M16), The American or English system indicates the specifications (e. g. 8,8 #, 10 #, 1 / 4,3 / 8) fasteners, Nuts are parts that connect mechanical equipment, Through the threads on the inside, Equvalent nuts and screws, To be connected together, For example, M4-0.7 nuts can only match with M4-0.7 screws (in the nuts, M4 finger nut inner diameter of approximately 4mm, 0.7 The distance between the two thread teeth is 0.7mm); American products, For example, 1 / 4-20 nuts can only be matched with 1 / 4-20 screws (1 / 4 finger nuts are approximately 0.25 inches inside diameter, 20 In each inch, With 20 teeth).1. We have constructed strong and long co-operation relationship with an enormous quantity of companies within this business overseas. Immediate and specialist after-sale service supplied by our consultant group has happy our buyers. Detailed Info and parameters from the merchandise will probably be sent to you for any thorough acknowledge. Hope to get inquiries type you and construct a long-term co-operation partnership. 2. We firmly think that we have the full capability to give you contented product. Wish to collect concerns within you and build a new long-term synergy romantic relationship. We all significantly promise:same excellent, better selling price; exact selling price, better quality. 3. We have advanced production technology, and pursuit innovative in products. At the same time, the good service has enhanced the good reputation. We believe that as long as you understand our product, you must be willing to become partners with us. Looking forward to your inquiry.