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DIN933 304 A2-70 hexagonal bolt

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DIN 912 refined hexagonal bolt cup head half round head flat head

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0102030405

China DIN 912 Hexagonal Bolts - Cup Head, Half Round Head, Flat Head | Suppliers & Factory of High-Quality Fasteners

Grade: 4.8, 8.8, 10.9, 12.9 | Material: Q235, 35K, 45K, 40Cr, 20Mn Tib, 35Crmo, 42Crmo | Surface Treatment: Blackened, Electrogalvanized, Dacromet, Hot-dip Galvanized, Galvanized, and more!

Our internal hexagonal screws are designed for machinery applications, offering significant advantages like ease of tightening, quick disassembly, and reduced slipping risks. These screws pair seamlessly with internal hexagonal wrenches, typically featuring a 90-degree bend with one long end and one short end. Using the shorter end for tightening while leveraging the longer end maximizes force application, ensuring screws are tightened effectively. Additionally, the longer end is characterized by a round head and a flat head, facilitating easy insertion into the screw hole for smooth disassembly.

While external hexagonal wrenches are generally more cost-effective to manufacture, they feature thinner screw heads that might be more suitable in certain applications. Nonetheless, internal hexagonal screws remain vital in machinery where precision, power intensity, and cost are crucial factors. As a leading China supplier and manufacturer, our factory guarantees high-quality internal hexagonal screws that meet diverse industrial needs, ensuring reliability across various machine applications.

Product Detail

Characteristic PRODUCTS

Q235 wire is commonly used for hex screws, and of course, iron screw wire is also used. The wire used for these screws can determine some of the characteristics of hex screws.

The first one is that the hardness of stainless steel screws is relatively high, but if it is made of iron, the hardness is significantly worse, which is related to the wire of the iron itself. The texture of iron itself belongs to a relatively soft category, which cannot be compared to stainless steel wire. However, in order to achieve the required hardness for iron screws, heat treatment is generally used to harden them. During the heat treatment process, it is necessary to ensure that the screws are uniformly heated. Otherwise, not only will the hardness of the screws not meet the requirements, but it will also make them easy to bend, greatly increasing the production cost of hexagonal screws. After heat treatment, it is possible to increase the hardness of iron hexagonal screws, but due to wire issues, it is still not possible to compare the quality with stainless steel wire.

One thing to note for hex screws is to try not to let the screw head slip during use, otherwise it will be difficult to remove the screw in the future.

How to use bolts USE

1. Excellent Tightening Effect

After the installation of the internal hexagonal bolt, the tightening effect is very good due to the tightening of the thread, and there will be no loosening of the bolt, which can effectively avoid the loosening problem caused by long-term vibration and vibration of mechanical equipment. At the same time, hexagonal bolts can also be used with locking washers, locking agents, and other auxiliary measures to prevent loosening, resulting in higher reliability.

2. Easy to Install

During the installation process of the internal hexagonal bolt, only the internal hexagonal wrench is needed for operation, which is simple and convenient, reducing manual operation time and cost. Compared with other bolts, hexagonal bolts are less prone to damage during installation, can be reused, and have a longer service life.

3. Wide Applicability

The biggest advantage of hexagonal bolts is that they have a wide range of applications. It can be applied to various industries and fields, including the automotive industry, aerospace, mechanical manufacturing, construction engineering, etc. During the manufacturing, installation, and maintenance processes, hexagonal bolts have also demonstrated excellent performance and reliability.

In summary: As one of the commonly used fasteners in mechanical equipment, internal hexagonal bolts have the advantages of high strength, good anti loosening effect, easy installation, and wide applicability, making them a very reliable fastener.

Frequently Asked Questions

Q: What materials are commonly used for hex screws?

Q235 wire and iron screw wire are commonly used to manufacture hex screws, and the choice of wire determines the core characteristics of the screws.

Q: How does the hardness of iron hex screws compare to stainless steel?

Stainless steel screws inherently have higher hardness. Iron screws are softer by nature, but their hardness can be increased using heat treatment, though they still cannot match the quality of stainless steel wire.

Q: What is critical during the heat treatment of iron hex screws?

It is essential to ensure the screws are uniformly heated. Otherwise, they may fail to meet hardness requirements and become easy to bend, which increases production costs.

Q: What should be avoided when using hex screws?

You should avoid letting the screw head slip during use, as a slipped head makes the screw extremely difficult to remove later.

Q: What tool is required to install internal hexagonal bolts?

Only an internal hexagonal wrench is needed for installation, making the operation simple, convenient, and cost-effective.

Q: In which industries are hexagonal bolts widely applied?

They are widely applied across various fields, including the automotive industry, aerospace, mechanical manufacturing, and construction engineering.