The following aspects need to be considered when choosing bolts:
Material and strength: The material and strength of the bolt directly affect its performance and life. Common materials include carbon steel and stainless steel. Carbon steel bolts are suitable for low-load structures, with low cost and good processing performance; stainless steel bolts have excellent corrosion resistance and are suitable for humid and corrosive environments. High-strength bolts are usually made of high-strength steel, and common strength grades are 8.8 and 10.9.
Length and diameter: The length of the bolt should be slightly larger than the thickness of the connection to ensure the tightness of the connection. The diameter is selected according to the specific needs of the connection. Common specifications include M12, M16, M20, etc.
Type: There are many types of bolts, including hexagonal head bolts, square head bolts, bolts for reaming holes, etc. The selection should be determined according to the specific usage scenario and requirements.
Surface treatment: Depending on the use environment and needs, the bolts may need to be blackened, galvanized, etc. surface treatment to enhance their corrosion resistance and aesthetics.
Use environment: In humid and corrosive environments, stainless steel bolts should be preferred; in situations where high loads are required, high-strength alloy steel bolts should be selected.
