Q:How is the screw nailed to the wall

First with the diameter of the nail into the half, and then come up with that nail, then screw into the screw

Q:What is the meaning of the 8.8 on the screw

8.8 is a high-strength screw! 6.8 is the strength of 4.8 is the national standard screws the highest high-strength screws is 12.9 I have seen the best and most exquisite

Q:How did the screw twist?

maintenance personnel with a large number of screwdriver three five in addition to get the two, he told me that the screwdriver should be used by the small model to the large model too, of course, I did not let you frequently change the screwdriver, but began to have too large Easy to spend, began to use a small easy to spend. Large screwdriver only after the screw has been spent on the stage.

Q:Also known as screw nails, I want to nail on the board, but there is no way to nail into the hard, how nail?

1, first clear the broken screw on the surface of the sludge with the center of the center of the gun will be killed by the center of the drill and then drill with a diameter of 6-8 mm drill bit in the center of the drill hole drilling, pay attention to the hole must drill through. After the hole is drilled, remove the small drill bit and replace the drill with a diameter of 16 mm. Continue to expand the hole of the bolt and drill it through. 2, take the diameter of 3.2 mm below the use of small and medium current in the broken bolt in the drilling from the inside to the outside of the surfacing welding site to take the beginning of the bolt half of the length of the bolt can not start too long So as to avoid breaking the outer wall of the broken bolt. Surfacing to the upper end of the broken bolt and then continue to pile out a diameter of 14-16 mm high 8-10 mm cylinder. 3, after welding with a hand hammer hammer its end point so that the broken bolt along its axial vibration.As the previous arc heat and subsequent cooling coupled with the vibration at this time will break the bolt and the body of the thread Between the resulting loosening. 4, carefully observed when you find a trace of rust after the break from the fracture when you can take the M18 nuts in the surfacing stigma and the two welding. 5, after welding with a cool hot plum wrench on the nut around the back and forth twist can also be back and forth twist side with a small hammer hammer the end of the nut so that you can remove the bolt off. 6, remove the broken bolt with the appropriate tap to the fabric within the rack to remove the hole to remove the rust and debris.

Q:What is the invention of the screw?

Should be the 18th century Mozzley in London invented all-metal precision screw lathe. The following year, Wilkinson made a nut and bolt making machine in the United States. Both machines can produce universal nuts and bolts. Nuts and bolts can be connected together metal parts, so to the 19th century, the manufacture of machinery to build houses of wood, has been replaced by metal.

Q:Screw M is mechanical teeth, tapping is what?

M is a mechanical tooth from the tapping is T

Q:What is the principle of screw

From a man with a manual screwdriver or a powered tool drive to produce a force pushing a small box up the slope. The longer the length of the screwdriver, the more effort it is, or the slope at the slope - that is, the amount of lubricant applied at the thread.

Q:I would like to look at my mp4 apart, the above screws are small, is cross-type, our family is not so small screwdriver, what can be used to screw the screw Oh, a little practical method Kazakhstan,

Is there a special small screwdriver that is special, if it is not used to cause or nails sometimes.

Q:Screws, bolts, screws, what is the difference between the three ah?

The screw is an incorrect call, non-professionals on the threaded parts collectively, in the industry without this call. In the fastener industry, in fact, screws and bolts are not a strict sense of the distinction. However, there are two ways in the industry to distinguish between screws and bolts: 1. According to the structure, the so-called twist structure, refers to the screw / bolt used to put the wrench above the place, that is, In some systems inside, the external pull the structure of the external screw rod-shaped parts are all called the bolt, on the contrary, will pull the structure called screw. This is a more obvious example is the Chinese national standard fasteners, for example, GB5782, GB5783 (a half thread, a full thread), the hexagonal bolts, The Because they are hexagonal structure, so, in the standard name, all called: bolts. 2, according to whether the product has a non-threaded bar features to distinguish. This is also a relatively wide use of a classification method, are generally so distinguish between bolts and screws. That is, if the part of the product other than the head is threaded, this part is called a screw. On the contrary, if, in addition to the thread but also has a light rod and other characteristics, called the bolt

Q:Why should the screw twist clockwise?

Most of the world's people are right-handed, right-handed twist the right-hand screw more smoothly.