Carriage bolts are round head square neck screws.
The wagon screws are divided into large half round head wagon screws (corresponding to standard GB/T14 and DIN693), and the small half-round head carriage bolts (corresponding to standard GB/t12-85).
Carriage bolts, a fastener consisting of two parts of the head and the screw (a cylinder with external threads), which should be fitted with the nut to tighten the connection of two parts with a pass hole.
The product is made of carbon steel with cold heading and the surface is treated as Dacro.DACROMET is the abbreviation for DACROMET, DACROMET, DACROMET, DACROMET, DACROMET.Zinc chromium coating is a new anticorrosive coating based on zinc powder, aluminum powder, chromic acid and deionized water.
