Q:No cross screwdriver, how can the screwdriver screwdriver?

If the head of the screw is fully exposed, use a large pliers to tighten the screw head from the side and turn the screw to the right.

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

Yes, can be directly set in the material, the basic material on the drilling, mainly used in the steel structure of the color steel tile can also be used for simple construction of thin plate fixed.

Q:How is the screw produced

Should be used machine tools (lathe) processing and then re-processing of it only have it

Q:Why the screw thread more closely, spin into the more effort?

Screw thread more dense, indicating the screw thread deep and shallow, the screw in the advance the resistance of the smaller, when the spin naturally more effort.

Q:Why a screwdriver can suck the screw

Bolt knife head with magnetic, and in the installation of small screws

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:What is the invention of the screw?

Today, many things are fixed with screws. Look around the house, the eyes see all kinds of things - from furniture to food processors, are connected with screws. The spirits were invented more than 2,000 years ago, but less than 500 years for fixing things.

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

Burning: some screw embroidery is very serious, with the above method is still ineffective, you can use the "fire attack." Put the screws and nuts thoroughly with gas oxidation flames, then drop a few pieces of oil into the red screw. The purpose of the heating screw is to heat the screws. The purpose of the drip is to quickly shrink the screws cold, increase the gap between the screw and the nut, the oil into the back nut can be unscrewed. But if there are plastic devices near the use of this method

Q:Why should the screw twist clockwise?

Because the screw on the original flute is the clockwise direction of it

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

Self-tapping screws are in the metal or non-metallic materials in the pre-drilling in the self-drilling with a threaded thread with a threaded fastener. Self-tapping screws with high tension, single, unilateral combination of features. Self-tapping screws are used for connection between thin metal plates (steel plates, saw boards, etc.). When connecting, first thread the bottom of the connector, and then screw the tapping screw into the threaded bottom hole of the connected part. As the tapping screw thread surface has a high hardness (≥ 45HRC), can be connected to the threaded bottom hole in the internal thread, thus forming a connection.