Stainless steel hexagonal screw

    Stainless steel hex screws are generally made of materials such as stainless steel SUS201, stainless steel SUS304, stainless steel SUS316, and so on. The commonly used stainless steel hex screws by customers come in two types: those with a rolled head and those without a rolled head. There are several methods to determine the material of stainless steel inner hexagon. The first method is to use the naked eye, which requires a team of experienced screw technicians or salespeople. But there is usually an error in determining the material of the stainless steel hexagon socket screw with the naked eye, which means it is not very accurate. The second method is to use a potion for testing. Drip a few drops of the test solution for stainless steel material onto the stainless steel hexagon socket screw. If it changes color, it will turn red, which is the stainless steel hexagon socket screw. If it does not change color, it is the stainless steel or higher grade screw. Generally,…