Do you understand the shape of high-strength bolts?
The shape of the high-strength bolt: the general countersunk head is used where the surface is smooth and does not protrude after the connection is required, because the countersunk head can be screwed into the part. The round head can also be screwed into the part. The tightening force of the square head can be larger, but the size is large.
In addition, in order to meet the needs of locking after installation, there are holes in the head and holes in the rods, which can not loosen the bolt when it is vibrated.
Some bolts without threads are to be thin, called thin waist bolts. This DIN 3570 type of bolt facilitates the coupling of the force.
There are special high-strength bolts on the steel structure, the head will be larger and the size will change.
In addition, there are special uses: T-slot bolts, used on machine tool fixtures, special shape, cut off both sides of the head. Anchor bolts for machine and floor attachments are available in a wide variety of shapes. U-Bolts, as mentioned above. and many more.
Fasteners are a class of mechanical parts that are used for fastening and are widely used. A wide variety of fasteners can be found on a variety of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and supplies. It is characterized by a wide variety of specifications, different performance uses, and the degree of standardization, serialization, and generalization is also extremely high. Therefore, some types of fasteners with existing national standards are also referred to as standard fasteners, or simply as standard parts. Fasteners are widely used mechanical foundations. As China joined the WTO in 2001 and entered the ranks of international trade powers. China's fastener products are exported to the world and fastener products from all over the world are also pouring into the Chinese market. As one of China's large import and export products, fasteners are in line with international standards, and have important practical significance and strategy for promoting Chinese fastener enterprises to the world and promoting fastener enterprises to participate in international cooperation and competition. significance.