Hex nut is also called hex nut. Generally, there are many types of nut, including hexagon nut, round nut, square nut and so on. Some standards for nuts are quite clear. Some specifications and size standards, material requirements standards, electroplating standards, etc. are relatively clear. Different types of nuts also have different standards. Let me introduce the specifications and standards of nuts in detail.
The first is that type 1 hexagon nuts can be divided into three grades: A, B, and C. Class A and Class B are suitable for mechanical equipment with higher precision, and Class C is used for mechanical equipment with rough surface and less precision. Secondly, the performance levels of type 1 hex nuts are 6/8/10, A2-50, A2-70, A4-50, A4-70, CU2, CU3 and AL4; the performance levels of type 2 hex nuts are 9 and 12 . The level between 1 and 2 is not the same concept. The former is the accuracy level, and the latter is the performance level. Pay attention to the discrimination.
There are generally two types, one is iron, that is, carbon steel. One is stainless steel, and of course there are copper and aluminum nuts, but these are less used. Copper is still somewhat useful, and nuts like aluminum are rarely used.
There are two hex nut grades, one is grade 4.8, ordinary nut, and the other is grade 8 nut. For more industry knowledge about nuts, please read the nut specification table and the national standard specification table of the nut industry. These nut specification sheets and industry standard knowledge. Let us have a deeper understanding of nuts.