Fasteners are an important component in mechanical assembly. According to the different performance classifications of materials, fastener materials are usually divided into the following grades:
1. 4.6, 4.8 grades: low-strength materials, suitable for some occasions with low strength requirements, such as general household furniture, lamps, etc.
2. 5.8 grade: medium-strength materials, suitable for environments with low strength requirements, such as bicycles, motorcycles and cars.
3. 8.8 grade: high-strength materials, suitable for occasions requiring higher strength, such as rail transit systems and engineering vehicles.
4. 10.9 grade: ultra-high-strength materials, suitable for occasions requiring extremely high strength, such as aircraft, high-speed trains, large mechanical equipment, etc.
Stainless steel: suitable for occasions with corrosion resistance requirements, such as ships, food processing and medical equipment.