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FAQ

What is the meaning of the screw and the 4 and 8?
He means that the tensile strength of the screw minimum 400MPa, the minimum yield strength of 320MPa (tensile strength of 80%). Please refer to the national standard GB3098.1 or ISO international standard ISO898-1 the requirements.
There are some screws, is installed in the electrical, power, electronic products on the material, ask how to correctly install the screws?
After we understand the characteristics of the screw, we can proceed to the next step. For example, we use the hands of a 8.8-wide hexagonal screws, then we have mastered the 8.8 hexagonal screws, the use of screws can be used to wipe some of the oil, so that we can protect the screws, in the invisible Which extended the life of the screw. And we have to use the 8.8-grade hexagon screw in the process, we will be able to know that we need to properly protect the screw head inside the hexagon, to prevent 8.8 grade hexagon screw skid, because we know 8.8 grade hexagon screw More difficult to take out. Then we can think of this screw should be used in what place? We can not put a small number of digital screws on the large industrial above, so that the screws can not withstand the pressure of large industrial above, so we need is to help the screw to choose a suitable place, so the screw on the matter The value of the.
What is the meaning of the 8.8 on the screw
Alina: refers to the strength of the thread level, the decimal point in front of the tensile strength, 8 is 800MPa, 10 is 1000MPa, the decimal point behind the value of the yield limit and the tensile limit ratio, .8 is 0.8.
This screw ye use, and how to use next to the cover
This is an expansion screw. Take a suitable electric drill bit to drill a hole in the wall, and then put the sleeve into the eyes of the drill, put the screw into the sleeve, this than the ordinary screw firm.
Screw M is mechanical teeth, tapping is what?
M is a mechanical tooth from the tapping is T
How to remove the broken screw?
Thick (5 or more) easy to handle, playing a hole with a dedicated wire on the line. Fine can be trouble, it is better to just re-drilling tapping.
Screws, bolts, screws, what is the difference between the three ah?
Screws and bolts have a clear professional terminology, there is a clear distinction, should not be arbitrarily named. Screw and bolt classification has more than 100 national standards, only the standard of the screw there are 92, the standard too much, not convenient memory, not listed one by one, but there are rules to follow, you can simply distinguish: all round And fasteners made of threaded rods are called screws. It must be screwed with a screwdriver, a slotted countersunk head screw, a countersunk head screw, a hexagon socket head screw, a hexagon socket head screw, etc. Set screws, all kinds of set screws, do not take off screws, axial screws; all kinds of knurled screws (with knurled without tools to tighten); there are wood screws and tapping screws and so on. Fasteners with hex head, square head and threaded rod are called bolts.
Why should the screw twist clockwise?
Because the screw on the original flute is the clockwise direction of it