Fastener is a general term for a type of mechanical parts used to fasten and connect two or more parts (or components) into a whole.
Depending on the application, the cold heading machine produces different types of fastening equipment.
The types of fasteners produced by cold heading machines are bolts, studs, screws, nuts, and self-tapping screws Bolts are a type of fasteners composed of two parts: the head and the screw (cylinder with external threads). It is used to fasten the connection of two parts with through holes. This form of connection is called bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolted connection is a detachable connection. One end must be screwed into a part with an internally threaded hole,
Stud: A type of fastener without a head, only threaded at both ends. When connected. The other end passes through the part with a through hole and then screws on the nut, even if the two parts are fastened together as a single piece. This form of connection is called a stud connection and is also a detachable connection. It is mainly used in places where one of the connected parts has a large thickness, requires compact structure, or is not suitable for bolt connection due to frequent disassembly. According to the application, it can be divided into three categories: machine screws, set screws, and special purpose screws. Machine screws are mainly used for a part that tightens the threaded hole,
Screws: It is also a type of fastener composed of two parts: head and screw. A fastening connection with a part with a through hole does not require a nut fit (this form of connection is called a screw connection and is also a detachable connection; It can also be used with a nut for a fastening connection between two parts with through holes. Set screws are mainly used to fix the relative position between two parts. Special purpose screws, such as eye screws, etc., are used for lifting parts. The shape is generally flat hexagonal column,
Nut: with internal threaded hole. There are also flat square cylindrical or flat cylindrical shapes, with bolts, studs or machine screws, which are used to fasten and connect two parts to make them a whole. However, the thread on the screw is a special thread for self-tapping screws. For fastening and connecting two thin metal members,
Self-tapping screws: similar to machine screws. To make it a whole, a small hole needs to be made in advance on the component, and because this screw has a high hardness, it can be directly screwed into the hole of the component, so that a responsive internal thread is formed in the component. This form of connection is also a detachable connection. But the thread on the screw is a special rib for wood screws,
Wood screws: also similar to machine screws. Wood screws produced by cold heading machines can be screwed directly into a wooden component (or part) and are used to fasten a metal (or non-metallic) part with a through hole with a wooden component. This kind of connection is also a connection that can be assembled. to increase the contact surface area of the connected parts,
Washer: a kind of fastener with an oblate ring shape. Placed between the support surface of the bolt, screw, or nut and the surface of the connecting part. Reduce the pressure per unit area and maintain the appearance of the connected parts from being damaged; Another type of elastic washer can also play a role in preventing the nut from loosening. It plays the role of preventing parts on the shaft or hole from moving left and right.
