The fasteners are typically divided into a bolt, studs, screws, nuts, self-tapping screws, wood screws, washers, retaining rings, pins, rivets, and the connecting sub-assembly, weld nails 12 categories, but also some categories Various classifications can be made according to its purpose, material used, strength grade, shape, surface treatment method, etc.
1. Bolt
Bolts are widely used in detachable connections in mechanical manufacturing, and are generally used with nuts ( usually matched with a
Two washers or two washers ) are used together.
2. Nut
Also known as a nut, it is screwed together with a bolt or screw to act as a fastening. It is often used in the production and manufacturing of machinery. It is easy to install, easy to disassemble, and reusable.
3. Screw
The screw is usually used alone (it can be used together with a washer as required), and the internal thread should be screwed into the body for tightening or tightening.
4. Stud
It is mainly used in the occasions 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.
5. Self-tapping screws
Used to fasten and connect two thin metal components to make them into a whole.
6. Wood screws
It can be screwed directly into the wooden component to fasten a metal (or non-metal) part with a through hole and a wooden component.
7. Washer
It is placed between the supporting surface of the bolt, screw or nut and the surface of the connected part to increase the contact surface area of the connected part, reduce the pressure per unit area and protect the surface of the connected part from damage.
8. Retaining ring
It is installed in the shaft groove or hole groove of the machine and equipment, and plays the role of preventing the parts on the shaft or hole from moving left and right.
9. Pin
It is mainly used for parts positioning, and some can also be used for connecting parts, fixing parts, transmitting power or locking other fasteners.
10. Rivet
A type of fastener consisting of a head and a nail shaft, used to fasten and connect two parts ( or components ) with through holes .
11. Connection Vice
The connection pair refers to a type of fastener supplied with a combination of a certain special bolt, nut and washer, such as a high-strength large hexagon head bolt connection pair for steel structures.
12. Welding nails
Since the light and the nail head ( or no stud ) heterogeneous fastener constituted by welding a connector secured to him - a part ( or member ) above, for then the connected component.
