Socket screws with a cylindrical head, also known as socket head bolts, cup head screws, and socket head screws. Although they have distinct names, they both mean the same thing. There are also 4.8, 8.8, 10.9, and 12.9 hexagon socket head screws that are regularly used. It is sometimes referred to as a hexagon socket screw or hexagon socket bolt. It has a hexagonal and cylindrical head.

Classification of hexagon socket head cap screws

They are classed as carbon steel, stainless steel, and iron based on the materials.v Stainless steel SUS202 hexagon socket head cap screws are commonly used stainless steel materials. There are SUS304 hexagon socket head cap screws and SUS316 hexagon socket head cap screws made of stainless steel.

The iron substance is classified based on the hexagon socket head screw's strength grade. There are hexagon socket cap screws rated 4.8, 8.8, 10.9, and 12.9. High-strength and high-quality hexagon socket head cap screws are grade 8.8-12.9 hexagon socket head cap screws.

According to the head shape

The hexagon socket screws are classified based on the shape of the hexagon socket screws' heads. The cylindrical head hexagon socket screws are the most widely used.

The hexagon socket screw can also be separated into half round head hexagon socket bolts, also known as pan head hexagon socket bolts, and countersunk head hexagon socket bolts based on the shape of the head.

The countersunk hexagon socket bolt's head is flat, and the inside of the bolt is hexagonal as well. Headless hexagon socket bolts, also known as stop screws, machine screws, and set screws, are also widely used. There is also a flower-shaped hexagon socket screw that is difficult to find or acquire on the market.

The production standard of hexagon socket head screws

The production standard of hexagon socket head screws is determined by whether the standard is national, German, British, or American. Each standard is unique.

Take hexagon socket head screws, for example, which have national standards such as grade 8.8 hexagon socket head screws for half teeth GB 5782, grade 8.8 hexagon socket head screws for complete teeth GB 2783, and grade 8.8 hexagon socket head screws GB 70-85 DIN912.

All product sizes in production must meet applicable criteria, and the product quality of each screw must meet the ISO 9001-2000 quality standard system certification. As a result, the manufacturer must create sturdy and dependable items. Furthermore, the standard GB 70-85 DIN912 for grade 8.8 hexagon socket head screws requires that the tensile strength of the hexagon socket head screws produced by the manufacturer be greater than 640MPa, and the standard GB 2076 for grade 4.8 hexagon socket head screws requires that the tensile strength of the hexagon socket head screws produced by the manufacturer be greater than 320MPa, the thread gauge M4 diameter must be equal to or less than 7mm, and the minimum dia.

Common standards for Grade 12.9 hexagon socket head cap screws

Grade 12.9 hexagon socket screws are the most often used series of high-strength bolts: grade 12.9 hexagon socket screws are typically employed in situations requiring excellent mechanical performance. Injection moulding machinery, hydraulic equipment, mould assembly, and other places are examples. After heat treatment, the surface hardness of grade 12.9 hexagon socket screws can reach 39-44 degrees. All grade 12.9 hexagon socket screws are manufactured in accordance with the German standard DIN912, the national standard GB / t70.1, the American Standard, and the British standard. American grade 12.9 socket head screws are available in sizes ranging from # 4 to 1-1 / 2, while British grade 12.9 socket head screws are available in sizes ranging from 1 / 4 to 1-1 / 2.

Grade 12.9 hexagon socket bolts are available with knurled or non-knurled heads. Grade 12.9 hexagon socket bolts typically have knurled heads, whereas low-strength hexagon socket bolts do not. Grade 4.8 hexagon socket bolts, for example, do not have knurled heads.

The surface of grade 12.9 hexagon socket bolts is cyanided and blackened. The product itself also has certain anti-rust properties. These 12.9-Grade high-strength bolt series goods, on the other hand, are generally utilised in exported equipment, and the surface of the 12.9-Grade hexagon socket head screws will be corroded by consumers in various hostile situations during transportation (such as shipping). However, some equipment (such as bread machinery and baking equipment) demands that the supporting hexagon socket screws be nickel and zinc plated to improve the corrosion resistance and look of grade 12.9 high-strength bolts.

Advantages of KENENG hexagon socket head cap screws

The regularity of the hexagonal inner wall's shape and polish.

The symmetry of hexagons

Inner hexagon socket bottom flatness

The above standards will be more stringent and accurate if the customer needs to make through holes for hexagon socket head screws.

KENENG has over ten years of fastener production experience, as well as specialised product designers and production lines. If you require regular products in large quantities or customised products based on your specifications, please do not hesitate to contact us.