Bolts: mechanical parts, with nuts cylindrical fasteners with threads. A class of fasteners consisting of two parts, the head and the screw (cylinder with external thread), to be fitted with a nut for fastening the connection of two parts through holes. This form of connection is called bolt connection. If the nut is screwed down from the bolt, the two parts can be separated, so the bolt connection is a removable connection.
Eyebolt
Eyebolts have a machine thread on one end and a lifting ring on the other. These bolts are used for a variety of suspension and variable tension applications. Eyebolts can be used for permanent fastening in side-to-side applications or in overhead applications to temporarily suspend light weights.
What kinds of bolts are generally divided into
1、According to the shape of the head
There are many head shapes of bolts, such as hexagonal head, square head, round head and countersunk head, etc., of which hexagonal head is the more common.
2、According to the connection force
There are different bolts with different connection forces, mainly divided into common bolts and bolts with reamed holes.
3、According to the thread type
There are two main types of bolt threads: coarse thread and fine thread.
4、According to the production precision
The bolts with different production accuracy are mainly divided into A, B and C. A and B are refined bolts, which are mainly used for lathe processing and generally have a performance level of 8.8.
5、According to the performance level
There are eight performance levels of bolts, namely 3.6, 4.8, 5.6, 5.8, 8.8, 9.8, 10.9 and 12.9, 8.8 grade above are low-carbon alloy steel high-strength bolts, and 8.8 grade below are ordinary bolts.
Applications
There are many names for bolts, and everyone's name may be different, some people call them screws, some people call them studs, and some people call them fasteners. Although there are so many names, the meaning is the same, they are all bolts. Bolt is a generic term for the fastener. Bolts are tools that use the physics and mathematics of beveled circular rotation and friction of an object to tighten the instrumental mechanism in a gradual manner.
Bolts are indispensable in everyday life and industrial manufacturing, and they are also called the rice of industry. This shows how widely bolts are used. Bolts are used in electronic products, mechanical products, digital products, electrical equipment, and electromechanical machinery products. The bolts are also used in ships, vehicles, water conservancy projects, and even chemical experiments. Anyway, there are many places where bolts are used. For example, precision bolts are used in digital products, micro bolts used in DVDs, cameras, glasses, clocks and watches, electronics, etc.; general bolts used in TVs, electrical products, musical instruments, furniture, etc.; large bolts and nuts used in engineering, construction, bridges, etc.; and large and small bolts used in transportation equipment, airplanes, trams, cars, etc. Bolts have an important task in industry, and as long as there is an industry on earth, the function of bolts will always be important.