Precision screws referred to as small screws, also known as micro screws, is a small fastener connecting product materials, the shape is small, but in the key parts, can play a key role. Widely used in electronics, electrical, electrical appliances, furniture, mechanical equipment and so on.
Precision screws are classified into self-tapping precision screws and machine wire precision screws
Classification:
Self-tapping precision screws
The main manifestation is that the tail is pointed, and the teeth are self-tapping. Thread This is not easy to say, there are self-tapping thread, organic thread. There are many head shapes of self-tapping precision screws, there are pan heads, countersunk heads, semi-countersunk heads, and the shape of the head also has its own pads and no pads. The tail is self-attacking with sharp tail, self-attacking with grooves, self-attacking with B teeth, and self-attacking with fast teeth. Self-tapping precision screws include pan head self-tapping screws, countersunk head self-tapping screws, semi-countersunk head self-tapping screws, self-tapping screws with self-tapping pads, self-tapping screws and so on.
Machine wire type precision screws
Refers to the tail without a tip, is flat end, and its tooth thread is relatively uniform, and the shape is similar to the self-attack class in all aspects.
Electroplate:
Electroplating of precision screws generally refers to iron precision screws, stainless steel precision screws generally do not need to be electroplated, unless the customer requires. Precision screw plating color is divided into environmental protection and non-environmental protection. Non-environmental protection precision screw electroplating color has color zinc, white zinc, black zinc, black, white nickel, black nickel, blue zinc and so on. Environmentally friendly precision screw plating color is environmentally friendly color zinc, environmentally friendly white zinc, environmentally friendly blue zinc, environmentally friendly black zinc, environmentally friendly nickel, environmentally friendly black zinc and so on.
Material:
The material of precision screws is iron and stainless steel, iron precision screws are generally made of iron wire pier, and the material is low carbon steel, medium carbon steel, and high carbon steel. The screw wire has 1010A, 1018, 10B21, 45 steel and so on. Stainless steel precision screws are generally made of stainless steel screw wire blocks. Its material is stainless steel SUS201, stainless steel SUS304, stainless steel SUS776, stainless steel SUS316, stainless steel SUS404 and so on.
Hardening:
If the precision screw is required to be higher, the product material has a hardness requirement for the precision screw, which generally needs to be hardened. Because many precision screws without hardening are easy to slip or break when used. The most fundamental reason for slipping teeth and breaking is that the precision screw hardness is not enough. Therefore, the precision screws with hardness requirements must be taken to be hardened.
