Generally speaking, what products are included in steel structural fasteners?

1. Stud: A type of fastener without a head and only with external threads on both ends. When connecting, one end of it 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 the nut must be screwed on, even if these two parts are tightly connected as a whole. This type of connection is called a stud 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.

2. Nuts: with internal threaded holes, generally in the shape of a flat Hexagonal prism column, and also in the shape of a flat square column or a flat cylinder, which are used to fasten and connect two parts together with bolts, studs or machine screws to form a whole.

3. Wood screw: It is also similar to machine screws, but the thread on the screw is a specialized thread for wood screws, which can be directly screwed into wooden components (or parts) to securely connect a metal (or non-metallic) component with a through hole to a wooden component. This type of connection is also a detachable connection.

4. Screw: It is also a type of fastener composed of a head and a screw, which can be divided into three categories according to its purpose: machine screws, set screws, and special purpose screws. Machine screws are mainly used for the fastening connection between a part with a threaded hole and a part with a through hole, without the need for nut coordination (this connection form is called screw connection, which is also a detachable connection; it can also be used with a nut for the 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 eyebolts, are used for lifting parts.

5. Washer: 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 pressure per unit area, and protecting the surface of the connected parts from damage; Another type of elastic washer can also prevent the nut from loosening.

6. 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 and used to tighten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, it can separate these two parts, so bolt connection is a detachable connection.

7. Self tapping screw: Similar to machine screws, but the thread on the screw is a specialized thread for self tapping screws. Used to tighten and connect two thin metal components to form a whole. Small holes need to be made in advance on the components. Due to the high hardness of this screw, it can be directly screwed into the holes of the components to form a responsive inner part

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