There are not only standard screws, but also non-standard screws. Non-standard screws are often used in production. Today, the manufacturer of Threaded Rods And Eye Bolts-Weigso will briefly talk about non-standard screws for you.
Generally speaking, non-standard screws are made of high-carbon steel, medium-carbon steel, low-carbon steel and other materials. The carbon content of carbon steel materials distinguishes low carbon steel, medium carbon steel, high carbon steel and alloy steel. Low carbon steel C%≤0.25% is usually called A3 steel in China. It is basically called 1008, 1015, 1018, 1022, etc. abroad. Mainly used for products with no hardness requirements such as grade 4.8 bolts, grade 4 nuts, small screws, etc. (Note: 1022 material is mainly used for drill tail nails) Medium carbon steel 0.25% 0.45%. At present, alloy steel is basically not used in the market: alloy elements are added to ordinary carbon steel to increase some special properties of steel: such as 35, 40 chromium molybdenum, SCM435, 10B38.
The main function of non-standard screws is to link and tighten the parts of the tool, which can also be called special-shaped screws. There are many screws that can be connected without a nut. Of course, the ones that do not use a nut are basically non-standard screws. Non-standard screws play a key role in the linking mechanism.
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