According to the material, there are iron, that is, carbon steel and stainless steel. This is rarely used, and it is basically hard to see in the market. The hex socket screw is our common screw head. Its advantage is […]
According to the material, there are iron, that is, carbon steel and stainless steel. This is rarely used, and it is basically hard to see in the market. The hex socket screw is our common screw head. Its advantage is […]