Carriage bolts

Round-head square-neck screws

Carriage bolts are divided into large semi-circular head carriage bolts and small semi-circular head carriage bolts according to the size of the head. Carriage bolts are a type of fastener consisting of a head and a screw (a cylinder with external threads). They need to be used with nuts 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 with a nut. A single bolt cannot play a connecting role. Tools generally use wrenches. The heads are mostly hexagonal heads, etc., which are generally larger. Carriage bolts are used in the groove. The square neck is stuck in the groove during installation, which can prevent the bolt from rotating. The carriage bolt can move parallel to the groove. Since the head of the carriage bolt is round and there is no design of a power-assisting tool such as a cross slot or hexagon socket, it can also play an anti-theft role in the actual connection process.

Material: Carbon steel, Q235, 45# steel, stainless steel

Nominal diameter: 5mm--20mm

Length: 15mm--300mm

Surface treatment: galvanizing, chrome plating, copper plating, surface blackening