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The basic meaning of the screw

Update:28-06-2019
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Screws are tools that use the physics and mathematical […]

Screws are tools that use the physics and mathematical principles of the circular rotation and friction of the bevel of an object to gradually tighten the components of the object. Screws are a general term for fasteners, everyday spoken language. Screws are indispensable industrial essentials in daily life: extremely small screws for cameras, glasses, clocks, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; for engineering, construction, and bridges, large Screws, nuts, transportation equipment, airplanes, trams, cars, etc. are used for both size and size. Screws have an important task in the industry. As long as there is industry on the earth, the function of the screw is always important. Screws are the common inventions in people's production and life for thousands of years. According to the application field, it is the first invention of human beings.
Basic meaning
Screws, also known as "screws" [Screw] (screws), "screws" (screws). In fact, the screw is a general name, and the screws and screw rods are different from each other. Screws are generally called wood screws; they are the ones with pointed ends on the front end. They have large pitch and are generally used for fastening wooden parts and plastic parts. The screw rod is a machine screw (mechanical screw), which is the kind of flat head at the front end. The pitch is small and uniform, and it is generally used to fasten metal and machine parts.
Ordinary bolts, we generally refer to the bolts required for low strength grades, generally 4.8 grades of ordinary bolts. The bolts with low hardness are not very high. Generally, ordinary bolt materials are produced by ordinary screw wires. The hardness, tensile strength and torque of ordinary bolt materials are not high. High-strength bolts generally refer to high-strength bolts. Their screw materials, bolt materials, and bolt materials are relatively good, and the hardness is relatively high. After being manufactured, the bolts are hardened. The bolts are required to reach the grade strength requirements of high strength bolts.

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