Q:The Symbolic Meaning of Screw

Although small, but plays a decisive role. The role of a person, for the cause of the revolution, as a machine on a screw. The machine as a result of the connection of many screws and fixed, only to become a solid whole, can be able to operate freely, to play its great ability to work. Although the screw is small, its role is not underestimated. I would like to make a screw hello forever. Screw to regular maintenance and cleaning, it will not rust. People's thinking is the case, to always check will not go wrong. - Lei Feng April 17, 1962 diary excerpts

Q:The idiom of the screw

Meaning modesty, that their own small insignificant, insignificant but indispensable.

Q:Is the tail screw? If it is mainly used in what place? If not what are they different?

Normally, it should be called drilling screws, screws are the use of the object of the circular circular rotation and friction of the physical and mathematical principles, step by step to tighten the tools of the tools. Drilling screw is the front of the screw with self-tapping the head of the wood screws. Screw is thousands of years of people in the production of common inventions, according to the application field, it is the first major inventions of mankind. Drilling screws are in recent years people's new invention, also known as self-tapping screws. Main steel for connecting between the need for ordinary or high-strength bolts, plates with self-tapping screw connection. It can not be used for metal and metal bonding.

Q:M4.8 * 25 What does it mean in screw size?

No meaning that there is no one of the most close to the national standard is, M5 * 25 For example, GB70.1, M5 × 25 hexagon socket head cap screws

Q:Inside the hexagonal screws, rather not down, it may be too much screw on the screw too tight has been bad 3 screwdriver screw is too small also one-half of rice grain please help think about ways

Skip the screws before tapping a few times. Sprinkle the rust on the screw, it should be easy to win.

Q:How to look at screw models

That is, there are certain specifications of the national standard, such as: M6, M8, M10, M12, M16, M20. Which 7911131415171819 there is no. Wrench it as such as: M6 wrench, M16 wrench and so on.

Q:Want to fix something, which is a triple iron (do not know how thick), would like to ask what screws can be turned into? Can ordinary drill go in? The question is to consider the drill or consider the screw, or have to consider? Thank you! The

You use high-strength drill bit, drill hole, after drilling with a tap, cone wire, tighten the screw, how much wire according to your choice.

Q:I would like to know the specifications of the two types of screws models, including length, diameter, diameter and pitch, etc.

M3 means that the large diameter (external thread is the outer diameter) is 3. Of course with M3 nut, the length of a move does not include the nut. Thread section length is also another specification. M6 indicates a nominal diameter of 6 mm and indicates that it is a standard pitch coarse thread.

Q:What is a screw? What is a nail? What is the concept? What is the difference!

The screw is a screw, a small cylindrical or conical metal rod with threaded parts, with a slotted or pocketed head, used alone. Machine nail is used for mechanical attack on the use of a good thread, or with nuts used to fasten the product, according to the material requirements have a certain force. The range of screws is wide, the nail is just one of the screws inside.

Q:What is a self-tapping nail? Is it used? What are the characteristics of the shape? What is the difference with ordinary screws?

Ordinary screws need to be fitted with nuts, or with the tolerance thread. Self-tapping nail body with self-tapping thread, you can directly into the wood, walls and other fixed use.