The carriage bolts carriage bolt head size divided by Mushroom head carriage bolts (corresponding to the standard GB / T14 and DIN693), less than half the round carriage bolts (corresponding to the standard GB / T12-85). Carriage bolts, consisting of a head and the screw (with the external thread cylindrical) sections of a type fasteners, to be with the nut for fastening two parts with hole. Carriage bolt means head square neck screw, carriage bolt 2 English as basic information in general, bolts used to connect two objects, usually by light hole, needs and nut (nut) with the use of the individual can not afford ligation. Tools typically with a wrench. Head mostly hexagonal top, generally larger. Carriage bolts applied to the tank, the Quartet neck during the installation of the card in the slot, can play to prevent rotation of the bolt, carriage bolts can be moved in parallel in the tank. Since the head carriage bolt rounded, not designed hexagonal cross slot within a class or help tools available 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, chrome, copper, stainless steel surface blackening 3 standard head square neck bolts ( carriage bolts) specifications: German standard DIN603 stainless steel small head square neck carriage bolts specification: GB GB / T12-85 stainless steel large head square neck carriage bolts specification: GB GB / T14-8 GB14 zinc plated carriage bolts 12x40 B-type head edge 27.5mm, thick 5.5MM, square neck on the side supporting the nut on the side 11.8MM 18.7MM, thick 9.6MM Shandong, Jinan, Dezhou, Taian, Liaocheng, Zibo, Jining, Heze, Linyi, Zaozhuang carriage bolts, carriage bolts, stainless steel carriage bolts, imperial carriage, American carriage bolts