In general, the bolts used to connect two objects, usually through the pupil, needs and nut (nut) with the use of a single role can not afford to connect. Tools generally with a wrench. Mostly hexagonal head first class, generally larger. Carriage bolts applied to the tank, the Quartet neck in the process of installing the card in the slot, can be prevented from rotating bolt, carriage bolts can be moved in parallel in the tank. Because of the rounded head carriage bolts, not designed hexagonal cross slot available within the class or power tools in the actual connection process can also play a security role. Materials: carbon steel, Q235,45 # steel, stainless steel nominal diameter: 5mm - 20mm Length: 15mm - 300mm Surface treatment: zinc, chromium, copper, solid surface blackening Handan standard fasteners Co. professional production and sales of fasteners standard parts manufacturers, fasteners professional service providers, with advanced production equipment and sophisticated detection equipment and strong technical force, has passed ISO9001:. 2008 international quality management system certification, the company's [label] Solid brand fasteners bolts nuts China won high strength fasteners industry quality products. Products are sold throughout the country, custom non-standard shaped high-strength bolts nuts 4.8, 8.8, 10.9, 12.9 fasteners and other materials are complete Q235,35 # .45 #, 40Cr, 35CrMoA, 30CrMo, 42CrMo, 20MnB, Q345B (16 Mn), 25Cr2MoV other stainless steel fasteners. Product standards: GB (GB), (HG), (JB) (SH), German standard (DIN), American Standard (ANSI), British standard (BS), Japanese Standard (JIS) and International Standards (ISO) and in accordance with customer demand for customized non-standard type fasteners. The company regards product quality as enterprise life of the contract, keeping promises, warmly welcome friends and friends culvert business negotiations. I believe we will become your most reliable supplier,