Fasteners typically include the following 13 types of parts
1. Bolt: A type of fastener consisting of a head and a screw (cylindrical body with external threads), which needs to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolted connection. If the nut is unscrewed from the bolt, it can separate these two parts, so the bolt connection is a detachable connection.
2. Stud: A type of fastener that does not have a head and only has external threads on both ends. When connecting, one end needs to be screwed into the part with an internal threaded hole, and the other end needs to pass through the part with a through-hole, and then screw on the nut, even if these two parts are tightly connected as a whole. This type of connection is called a bolted connection and is also a detachable connection. Mainly used in situations where one of the connected parts has a large thickness, requires a compact structure, or is not suitable for bolt connection due to frequent disassembly.
3. Screw: It is also a type of fastener consisting of a head and a screw, which can be divided into three categories according to their use: machine screws, set screws, and special-purpose screws. Machine screws are mainly used for fastening connections between a part with a threaded hole and a part with a through-hole, without the need for nut fitting (this type of connection is called a screw connection, which is also a detachable connection; it can also be used in conjunction with a nut for fastening connections between two parts with through-hole). Tightening screws are mainly used to fix the relative position between two parts. Special purpose screws such as lifting ring screws are used for lifting parts.
4. Nut: with internal threaded holes, generally in the shape of a flat hexagonal column, but also in the shape of a flat square column or a flat cylindrical shape, used in conjunction with bolts, screws or machine screws to fasten and connect two parts into a whole.
5. Self tapping screw: Similar to machine screws, but the thread on the screw is a specialized thread for self tapping screws. Used to fasten and connect two thin metal components into a single unit, small holes need to be pre made on the components. Due to the high hardness of these screws, they can be directly screwed into the holes of the components to form responsive internal threads
6. Wood screws: Similar to machine screws, but the thread on the screw is a specialized wood screw thread that can be directly screwed into a wooden component (or part) to securely connect a metal (or non-metal) part with a through-hole to a wooden component. This type of connection is also a detachable connection.
7. Gasket: A type of fastener with a flat circular shape. Placed between the support surface of bolts, screws or nuts and the surface of the connecting parts, it plays a role in increasing the contact surface area of the connected parts, reducing the unit area pressure, and protecting the surface of the connected parts from damage; Another type of elastic washer can also prevent the nut from loosening.
8. Retaining ring: Used to be installed in the shaft groove or hole groove of machines or equipment, it plays a role in preventing the parts on the shaft or hole from moving left and right.
9. Sales: Mainly used for component positioning, some can also be used for component connection, fixing components, transmitting power, or locking other fasteners.
10. Rivet: A type of fastener consisting of a head and a shank, used to fasten and connect two parts (or components) with through holes, making them a whole. This type of connection is called rivet connection, abbreviated as riveting. Belonging to non detachable connections. Because to separate the two connected parts, it is necessary to break the rivets on the parts.
11. Combination parts and connecting pairs: Combination parts refer to a type of fastener supplied in combination, such as a machine screw (or bolt, self supplied screw) supplied in combination with a flat washer (or spring washer, locking washer); Connecting accessories refer to a type of fastener that combines a specific type of bolt, nut, and washer for supply
12. Welding nail: A heterogeneous fastener composed of light energy and nail head (or no nail head), which is fixed and connected to a part (or component) by welding method for further connection with other parts.
13. Steel wire thread sleeve: Steel wire thread sleeve is a new type of threaded connection component, which is refined from high-strength, high-precision corrosion-resistant diamond wire. Shaped like a spring, installed in a specific screw hole on the base, its inner surface forms standard threads. When matched with screws (bolts), it can significantly improve the strength and wear resistance of the threaded connection; Especially on low strength materials such as aluminum, magnesium, cast iron, and plastic. Locking type is to add one or several locking rings on the basis of the ordinary type. Xinxiang Yongda Industrial Co., Ltd. is a professional manufacturer of steel wire thread inserts. It is recommended to embed steel wire thread inserts into the threads of low strength engineering materials such as aluminum, magnesium alloy, cast iron, fiberglass, plastic, etc., to form standard M and MJ threads, which have continuous strength, impact resistance, and wear resistance functions, and can disperse stress to protect the substrate threads, greatly extending the service life of the substrate. At the same time, the stress situation of the thread has been improved, forming an elastic connection, eliminating pitch and profile half angle errors between the internal and external threads, evenly distributing the load on the thread, protecting the base thread from damage, and extending its service life
