According to the connection of the force of the way points: sub-ordinary and hinge with the hole. By the head shape points: a hexagonal head, round head, square head, countersunk head and so on. Which hexagonal head is the most commonly used. The general head is used where the connection is required.
Application is very extensive.
Bolt has a lot of names, each person's name may be different, it was called a screw, it was called a bolt nail, some people called the standard parts, it was called fasteners. Although there are so many called, but the meaning is the same, are bolts. Bolts are common to fasteners. The principle of the bolt is to use the object of the slope of the circular rotation and friction of the physical and mathematical principles, step by step to tighten the tools of the tools.
Bolts in the daily life and industrial manufacturing which is indispensable, bolts are also known as the industrial rice. Visible bolts are widely used. The use of bolts are: electronic products, machinery products, digital products, electrical equipment, mechanical and electrical machinery products. Ships, vehicles, water conservancy projects, and even chemical experiments are also useful bolts. Anyway, there are more places to use the bolt. Especially in the digital products used above the precision bolts. DVD, camera, glasses, watches and clocks, electronics, etc.; bolts for television, electrical products, musical instruments, furniture and so on; as for engineering, construction, bridges use large bolts, nuts; Such as the size of the bolt and use. Bolt in the industry has an important task, as long as there is industry on earth, the bolt function is always important.
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