What are the features of screw bolts?

What are the features of screw bolts?
The purity and quality of the materials are directly related to the quality of the screw bolts. Those made of good materials are not easy to twist off and have a better fastening effect. Common materials for making screw bolts include carbon steel, stainless steel, copper and copper alloy. The raw materials of grade 8.8 and above are low-carbon alloy steel or medium-carbon steel, which are formed by heat treatment.

Cold heading forming process requires high demands, which requires more sophisticated production equipment. The imported production equipment increases the cost and difficulty of screw bolts.

High-strength and high-precision screw bolts are often heat-treated to make them have better functions.

Some screw bolts are sometimes used in special environments, such as high-speed rail tracks. This highly vibrating environment requires them to be tightly hugged together to prevent loosening.

The screw bolts will form a fine oxide layer on the surface of the bolts during the appearance treatment to prevent them from being corroded and shorting the service life.