What is the pitch of m4?
The pitches of M4, M5 and M6 are 0.7, 0.8 and 1.0 respectively. Pitch, the axial distance between the corresponding points of two adjacent teeth on a thread.
1, pitch: the axial distance between two corresponding points on the pitch line of two adjacent teeth on the thread. (The diameter of an imaginary cylinder with the same width as the groove and protrusion on the tooth profile where the generatrix passes is called the middle diameter, and the generatrix of the centerline cylinder is called the middle diameter line. )
2. The appearance of spiral CT produced a new concept, pitch (P). For the early single-layer spiral, the definition of this is unified by all manufacturers, that is, pitch = feed distance/collimation width of tube rotating 360 degrees. The pitch concept of multi-slice spiral CT is a bit complicated, and a collimation width of multi-slice CT contains multiple adjacent images.
3. Screw is a tool to tighten the parts of utensils step by step by using the physical and mathematical principles of circular rotation and friction of the inclined plane of objects. Screw is a general term for fasteners.
4. Screw, some people call it "screw" (screw) and "screw" (screw). In fact, screws are universal, and screws and screws are different. Screws are generally called wood screws; It's the kind with a pointed tip at the front end, with a large pitch, which is generally used to fasten wooden parts and plastic parts. Screw is a kind of machine screw (mechanical screw) with a flat head at the front end. It has a small and uniform pitch and is usually used to fasten metal and machine parts.
How many kinds of screws are there for light bulbs?
1. Due to the different installation methods of bulbs, they can be divided into bayonet bulbs and screw bulbs. Usually, the lamp holder must correspond to the corresponding spiral bulb. The screw specifications of light bulbs are as follows: E 14, E27, E 12, E26.
2. Long-term use of screw bulbs has specifications of E 14 and E27, which is characterized by the fact that the threaded metal is one of the electrodes, so it is required that the electrode touching the thread on the socket should be connected to the electrode connecting line between the zero line and the middle dot of the bulb during installation, otherwise people will get an electric shock if they accidentally touch the exposed metal.
What is the pitch of m4? How many kinds of screw holes are there in light bulbs? You must have understood the answer after reading the introduction above. When choosing a light bulb, you should go to a regular store, so that the quality of the light bulb can be better. There are many specifications and types of products of general brands. What kind of light bulb to choose should be combined with the actual needs of your home.