China Suppliers Factory DIN 912 Hexagonal Bolts - Cup Head, Half Round, Flat Head, Various Grades and Materials

Our hexagonal screws come in a range of grades including 4.8, 8.8, 10.9, and 12.9, made from high-quality materials such as Q235, 35K, 45K, 40Cr, 20Mn Tib, 35Crmo, and 42Crmo. We offer various surface treatments like blackened, electrogalvanized, Dacromet, hot-dip galvanized, and standard galvanized to meet diverse industrial needs.

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As a leading supplier and factory in China, we specialize in internal hexagonal screws that are widely used in machinery. These screws offer significant advantages including easy tightening, efficient disassembly, and reduced slipping risk. Our internal hexagonal wrenches, designed with a 90° bend and varying lengths, allow for maximum torque when fastening screws. The shorter end effectively rotates the screw while the longer end enhances grip, making the process more efficient. Additionally, our wrenches feature round heads that easily fit into screw holes for hassle-free disassembly.

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While external hexagonal wrenches are more cost-effective and have thinner heads, our internal hexagonal screws are preferred in precision applications where reliability is crucial. Machines with lower cost and power requirements use fewer internal hexagonal screws, highlighting their specialized role in high-performance settings. Trust our China-based factory for your hexagonal screw needs, ensuring quality and reliability in every batch.

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PRODUCTS DETAILS

Characteristic
PRODUCTS
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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.
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Frequently Asked Questions
What materials are commonly used to manufacture hex screws?
Q235 wire is commonly used for hex screws, and iron screw wire is also widely used in manufacturing.
How does the hardness of iron hex screws compare to stainless steel screws?
Stainless steel screws have a higher hardness level. Iron screws are naturally softer, but they can be hardened via heat treatment to meet the required hardness specifications.
Why is uniform heating important during the heat treatment of iron screws?
Uniform heating ensures the screws meet the proper hardness requirements. If not heated uniformly, the screws can easily bend, which significantly increases production costs.
What precautions should be taken when using hex screws to avoid removal issues?
It is important to avoid letting the screw head slip during use, as a slipped head will make the screw very difficult to remove in the future.
What are the primary benefits of using internal hexagonal bolts?
Internal hexagonal bolts offer high strength, exceptional anti-loosening effects (especially under vibration), simple installation with a hex wrench, and wide applicability across various industries.
In which industries are hexagonal bolts widely applied?
They are widely used in multiple fields, including the automotive industry, aerospace, mechanical manufacturing, and construction engineering.

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