Low carbon steel C%≤0.25% is usually called A3 steel in China. Foreign countries are basically called 1008, 1015, 1018, 1022 and so on. It is mainly used for products without hardness requirements such as grade 4.8 bolts, grade 4 nuts, and small screws (Note: 1022 material is mainly used for drillin......

Everyone is very familiar with the screw, which is basically the most basic small part we use. In China, the screw standard is stipulated according to our own standard parts. So for this hexagonal screw, it What is the size? What is the difference between the inner hexagonal screws and outer hexagon......

Hexagon Head Bolt are often encountered in daily life, but because there are many specifications of hexagonal bolts, consumers also buy hexagonal bolts that cause certain difficulties. Let's take a look at what is a hexagonal bolt and the specifications of a hexagonal bolt.