| Hexagon nuts | ||
| Thin nuts | Its thickness m is relatively thin, and it is mostly used in occasions where the surface space of the connected parts is limited | |
|
Type 1 hexagon nuts
(the most widely used) |
Grade A | They are used on machines, equipment or structures with relatively smooth surfaces and high accuracy requirements |
| Grade B | ||
| Grade C | It is used on machines, equipment or structures with rough surface and low accuracy requirements | |
| Type 2 hexagon nuts | Its thickness is relatively thick, and it is mostly used in occasions that often need to be assembled and disassembled. | |