What is the treatment method for rail carriage bolts? The carriage bolt is a type of fastener consisting of a head and a screw (a cylinder with an external thread), which needs to be matched with a nut to fasten and connect two parts with through holes.
Generally speaking, bolts are used to connect two objects, usually through a light hole, and need to be used in conjunction with a nut. Tools generally use wrenches. The head is mostly hexagonal and generally larger. The rail carriage bolt is used in the groove, the square neck is stuck in the groove during the installation process, which can prevent the bolt from rotating, and the carriage bolt can move in parallel in the groove.
Since the head of the carriage bolt is round, there is no design of available power tools such as cross grooves or hexagon sockets, which can also play a role in preventing theft in the actual connection process. Material: carbon steel, Q235, 45# steel, stainless steel Nominal diameter: 5mm - 20mm Length: 15mm - 300mm Surface treatment method: galvanized, chrome-plated, copper-plated, surface blackening Common carriage bolts: large round head carriage Bolts, small round head carriage bolts, GB12 carriage bolts, DIN603 carriage bolts, American carriage bolts, etc.