1. What is a Phillips socket screw?
The outer edge of the head of the Phillips socket screw is round, and the middle is a recessed Phillips. When in use, the cross-shaped screwdriver must be used for loading and unloading. Commonly used in machinery, it mainly has the advantages of easy fastening, disassembly, and not easy to slip corners.
2. What is the application range of screws?
The screws are widely used, ranging from household hardware, electrical products, mechanical equipment products, to the wind power industry, the aerospace industry, office equipment industry, the electronics industry, the communications industry, the shipbuilding industry, etc.
3. What are the grades of screws?
The performance grades of screws are divided into more than 10 grades, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, among which screw of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel and are heat-treated (quenched, tempering), commonly known as high-strength screw, and the rest are commonly known as ordinary screw. According to the stainless steel material, there are 201, 304, and 316 stainless steel.
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