What are the requirements for the material and hardening of precision screws?

What are the requirements for the material and hardening of high-precision screws? The key of high-precision screws is called small screws. Not only the top of the screw head is small, the hole diameter of the screw is small, the screw length is short, and the unit weight is relatively light. Some high-precision screws can be ignored. The production and processing technology standards of high-precision screws are very precise, and are particularly high in the fields of dimensional tolerance regulations and specifications.

The materials of high-precision screws are iron and stainless steel. Iron precision screws are generally made of iron wire piers. The materials are high-carbon steel, low-carbon steel, and high-carbon steel. Screw wires are 1010A, 1018, 10B21, 45# steel and so on. Stainless steel high-precision screws are generally made of stainless steel screw wire piers. The materials are stainless steel SUS201, stainless steel SUS304, stainless steel SUS776, stainless steel SUS316, and stainless steel SUS404.

If the high-precision screw needs to be higher, the raw material of the commodity has strength requirements for the high-precision screw, and generally it must be hardened. Because many unhardened high-precision screws are very easy to slip or break when applied to commodity raw materials. The most essential factor for slippage and breakage is the lack of hardness of high-precision screws. Therefore, the spiritual essence screws with strength requirements must be hardened.