Hexagon socket stainless steel screws

Cylindrical head hexagon socket head screws, also known as hexagon socket head bolts, cup head screws, and Stainless Steel Lag Screws, have different names but the same meaning. Commonly used hexagon socket screws include grade 4.8, grade 8.8, grade 10.9, grade 12.9, etc. Also called hexagon socket screws, also called hexagon socket bolts. Stainless Steel Eye Screws have two types of heads: hexagonal head and cylindrical head. According to material, it is divided into stainless steel and iron. Stainless steel includes ordinary stainless steel SUS202 hexagon socket screws, stainless steel SUS304 hexagon socket screws, and stainless steel SUS316 hexagon socket screws. Iron is divided according to the strength of the hexagon socket screws. There are grade 4.8 hexagon socket bolts, grade 8.8 hexagon socket bolts, grade 10.9 hexagon socket bolts, and grade 12.9 hexagon socket bolts. Grade 8.8-12.9 hexagon socket bolts are called high-strength and advanced hexagon socket bolts

     The national standard number for Carbon Steel Self Drilling Screws is GB70-1985. Available in various specifications and sizes. Commonly used specifications and standards are 3*8, 3*10, 3*12, 3*16, 3*20, and 3*25. 3*30, 3*45, 4*8, 4*10, 4*12, 4*16, 4*20, 4*25, 4*30, 4*35, 4*45, 5*10, 5* 12, 5*16, 5*20, 5*25, 6*12, 6*14, 6*16, 6*25, 8*14, 8*16, 8*20, 8*25, 8*30, 8*35, 8*40, etc. [1]Aperture
     Hexagon socket bolts are classified according to screw hardness, load-bearing tensile strength, yield strength, etc. What is the grade of hexagon socket bolts? Different product terminals require different levels of hexagon socket head bolts for fastening. All hexagon socket head bolts are available in the following grades:
Hexagon socket bolts are divided into ordinary bolts and high-strength bolts according to their strength levels. Ordinary hexagon socket bolts refer to grade 4.8, and high-strength hexagon socket bolts refer to grade 8.8 and above, including grade 10.9 and 12.9. Class 12.9 hexagon socket head bolts generally refer to knurled, oily black hexagon socket head screws. figure 2
The performance of hexagon socket bolts for Mild Steel Screw is divided into more than 10 grades, including 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc. Among them, bolts of grade 8.8 and above are made of low carbon steel or medium carbon steel and have been heat treated. (Quenching, tempering) are commonly known as high-strength bolts, and others are commonly known as ordinary bolts. The bolt performance grade label consists of two parts of numbers, which represent the nominal tensile strength value and yield strength ratio of the bolt material.