What parts do fasteners contain?

Fasteners typically include the following 12 types of parts: bolts, studs, screws, nuts, self tapping screws, wood screws, washers, retaining rings, rivets, components and connecting pairs, and weld studs.

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 must be screwed into the part with an internal threaded hole, and the other end must pass through the part with a through-hole, and then a nut must be screwed on, 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 shaft 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 positioning parts left and right, some can also be used for connecting parts, fixing parts, transmitting power, or locking fasteners.

10. Rivet: A type of fastener consisting of a head and a shank, used to fasten and connect two perforated parts (or components) into a single piece. This type of connection is called rivet connection, abbreviated as riveting. Belongs to non removable links. Because if two connected parts are separated, the rivets on the parts must be broken.

11. Components and connection sets: Components are 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); A connecting pair refers to a type of fastener that combines a specific type of bolt, nut, and washer, such as a high-strength large hexagonal head bolt connecting pair used in steel structures.

12. Welding nail: A heterogeneous fastener consisting of a nail rod and a nail head (or no nail head), which is welded to connect other fixed components to a part (or component) for further connection with other parts.