Q:How is the screw nailed to the wall

Use a hammer to make a hole in the wall, and then plug a plastic expansion tube, the last screw.

Q:What is the meaning of the screw and the 4 and 8?

Screw should be written on the 4.8 bar, 4.8 on behalf of the strength level

Q:How is the screw produced

There are three types of technology: cold heading, red, turning; rolling teeth generally have four kinds of technology: rubbing teeth, rolling wire, teeth, car teeth; but our screw industry is the most common Is the beginning of the cold heading, the machine rubbing teeth, so that large output, low cost

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

M4.8 is the screw size 25 is the length of the screw

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

Self-tapping screw; is a screw with a drill bit, through a dedicated power tool construction, drilling, tapping, fixed, locked once. Self-tapping screws are mainly used for the connection and fixing of some thin plate pieces, such as the connection of color steel plate and color steel plate, the connection of color steel plate and purlins, wall beam, etc., its penetrating power is generally not more than 6mm, the maximum does not exceed 12mm.

Q:Was rusty rust, the screwdriver are turning how to do, is a very important thing

1 shock: for the rusty screws, do not use a wrench hard to prevent the screw screw six edges and corners, screw off the screw or wrench bad wrench. At this point, you can use the hammer gently shake the handle of the wrench, the general rust-proof screws can be twisted under the vibration. 2 knock: with the edge of the top hammer, knocking the corrosion of the nut, it is easy to loose nut. For example, the bike's feet at both ends of the fixed bolt nut, according to the foot pedal thickness, metal structure, grasp the size of the force hit the nut. Cast iron at the nut can be slightly larger force, plastic to gently beat. If you still can not, then use the hammer along the direction of the circle beat the nut, you can easily remove the nut.

Q:Very urgent, please help a lot. I do not have any advanced tools, only the screwdriver or something

Use a 502 glue to stick the screwdriver above it and then twist it down

Q:Please understand the friends of the self-tapping nails, screws, nuts production process, is the manufacturer's process. The more specific the more detailed the better

According to the screw nut and thread size custom the corresponding mold, mold is done into the material, then the head - rubbing - surface treatment - the packaging is complete.

Q:What is the size of the screw for the wall power switch installation

Concealed switch generally M5 × 30 semi-round head screws, you can also use M4 × 30 tapping screws. Ming installed switch is used M5 expansion with M5's self-tapping screws.

Q:What is the difference between Chinese-made screws and US screws?

China-made screws and the United States is no essential difference between the screws, and now the world are using the screws in China.