About the knowledge of screw processing and the standard introduction of screws!

Everyone knows how useful fasteners are, so what do you know about it? Woolen cloth? The following editor will lead you to learn about the knowledge of screw processing and the standard introduction of screws!
1. Bolt: 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 . This form of connection is called a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

2. Stud: No head, only a type of fastening with external threads on both ends pieces. When connecting, one end of it needs to be screwed into the part with the inner threaded hole, the other end is passed through the part with the through hole, and then the nut is screwed on, even if the two parts are tightly connected as a whole. This form of connection is called a stud connection, which is also a detachable connection. It is mainly used in occasions where one of the connected parts is thick, 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 used according to the purpose. There are three categories: machine screws, set screws and special purpose screws. Machine screws are mainly used for a fastened connection between a part with a fixed threaded hole and a part with a through hole, without the need for nut matching (this connection form is called screw connection, which is also a detachable connection; it can also be Matching with nuts, it is used for fast 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 eyebolts, are used for hoisting parts.

4. Nut: with internal threaded holes, the shape is generally flat hexagonal, and some are flat Square or flat cylindrical, with bolts, studs or machine screws, used to fasten and connect two parts to make them a whole.

5. Self-tapping screw: similar to machine screw, but the thread on the screw is for special self-tapping screw thread. It is used to fasten and connect two thin metal components to make them a whole. Small holes need to be made in advance on the components. Due to the high hardness of this kind of screw, it can be directly screwed into the hole of the component, so that the Forms a responsive internal thread. This form of connection is also a detachable connection.

6. Wood screw: It is also similar to machine screw, but the thread on the screw is a special rib for wood screw , which can be directly screwed into a wooden component (or part), used to fasten a metal (or non-metallic) part with a through hole and a wooden component together. This connection is also a detachable connection.

7. Washer: A type of fastener with a flat circular shape. It is placed between the supporting surface of the bolt, screw or nut and the surface of the connecting parts, which increases the contact surface area of the connected parts, reduces the pressure per unit area and protects the surface of the connected parts from damage; another type of elastic washer, It can also play a role in preventing the nut from loosening.

8. Retaining ring: for installation in the shaft groove or hole groove of the machine and equipment, to prevent the shaft The effect of the left and right movement of the part on the upper or hole.

9. Pin: Mainly used for part positioning, and some can also be used to connect parts, fix parts, and transmit power or for locking other fasteners.

10. Rivet: A type of fastener consisting of a head and a shank, used to fasten Connect two parts (or components) with through holes firmly to make them a whole. This form of connection is called rivet connection, or riveting for short. It belongs to the non-detachable connection. Because to separate the two parts that are connected together, the rivets on the parts need to be broken.

11. Assemblies and connecting pairs: Assemblies refer to a type of fasteners supplied in combination, such as Certain machine screws (or bolts, self-supplied screws) and flat washers (or spring washers, lock washers) are supplied in combination; connecting pair refers to a type of fastener that is supplied in combination with certain special bolts, nuts and washers, such as steel structures Connect the pair with high-strength hexagon head bolts.

12. Welding nails: heterogeneous fasteners due to light energy and nail heads (or no nail heads) , Use welding to fix it on a part (or component) so that it can be connected with other parts.