Do you Know Hexagon Socket Screws?

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Cylinder-head hexagon socket screws, also referred to as hexagon socket bolts, cup-head screws and hexagon socket screws, are called differently, but they represent the same meaning. The commonly used hexagon socket head screws also have 4.8, 8.8, 10.9, and 12.9. Also called hexagon socket screws, also called hexagon socket bolts. The head is hexagonal and cylindrical. According to the material, there are stainless steel and iron. Stainless steel has stainless steel SUS202 hexagon socket head screw. This is a common stainless steel material. There are stainless steel SUS304 hexagon socket head screw and stainless steel SUS316 hexagon socket head screw. The iron is classified according to the strength grade of the hexagon socket head screw. There are 4.8 grade hexagon socket head screws, 8.8 grade hexagon socket head screws, 10.9 grade hexagon socket head screws, and 12.9 grade hexagon socket head screws. Grade 8.8-12.9 hexagon socket head screws are called high-strength, high-grade hexagon socket bolts.

Hexagon Socket Screws

Hexagon Socket Screws


Hexagon socket bolts are classified according to the hardness of the screw wire, tensile force, yield strength, etc., which is the grade of the hexagon socket bolt and what is the grade of the hexagon socket bolt. Different product materials require different grades of hexagon socket bolts to correspond to them. All hexagon socket bolts have the following grades:

Hexagon socket bolts are divided into ordinary and high-strength according to their grade strength. Ordinary hexagon socket bolts are grade 4.8, and high-strength hexagon socket bolts are grade 8.8 or higher, including grade 10.9 and grade 12.9. Class 12.9 hexagon socket bolts generally refer to knurled, natural black hexagon socket head screws with oil.

The performance grades of hexagon socket bolts for steel structure connection 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. The bolts of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel. After heat treatment (quenching and tempering), they are generally called high-strength bolts, and the rest are generally called ordinary bolts. The bolt performance grade label consists of two parts of numbers, which respectively indicate the nominal tensile strength value and the yield ratio of the bolt material.

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