1, the nut is a nut, which is screwed together with the bolt or screw to play a fastening role. It is the original part that all manufacturing machinery must use. There are many kinds of nuts, including national standard, British standard, American standard and Japanese standard nuts. Nuts are divided into several types according to different materials, such as carbon steel, high strength, stainless steel and plastic steel. According to different product attributes, national standard numbers are divided into ordinary, non-standard, (old) national standard, new national standard, American system, English system and German system. Threads of different sizes are of different specifications. General national standards and German standards are expressed by m (such as M8, M 16), and fractions or # are used for American and British systems (such as 8#, 10#,14, 3/8).

2. Nuts are parts that closely connect mechanical equipment. They can only be connected by internal threads, nuts and screws of the same specification. For example, M4-0.7 nut can only be equipped with M4-0.7 screw (in the nut, M4 means that the inner diameter of the nut is about 4mm, and 0.7 means that the distance between two thread teeth is 0.7 mm); So are American products. For example, the nut of 1/4-20 can only be matched with the screw of 1/4-20 (1/4 means that the inner diameter of the nut is about 0.25 inch, and 20 means that there are 20 teeth per inch).

3. At present, Yongnian Hebei Store, the largest nut production distribution center in China, has reasonable price and local logistics extending in all directions, but nuts with high precision and high-tech content are the most reliable in some cities in the south. Speaking of Yongnian nuts, it is like a small commodity in Yiwu, which is very famous!

General national standard for nuts

Hexagon nut GB 41Ⅰ-Grade C

Hexagon nuts GB 6170 Ⅰ-Grade A and Grade B

Gb 6171I hexagon nut-fine tooth-grade a and grade b.

Grade A and B Chamfering of GB6 172 Hexagon Thin Nut

GB6 173 Hexagon Thin Nut with Fine Teeth Grade A and Grade B..

GB6 174 Hexagon Thin Nut-Class B-No Chamfering

Grade A and B of GB 6175 Ⅱ hexagon nuts

GB 6176 Ⅱ hexagon nut has fine teeth of Grade A and Grade B..

GB6 177 Hexagonal hexagon nuts with flange Grade A

GB56 hexagon thick nuts

GB 1229 hexagon nut (high strength for steel structure)