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China Suppliers Factory DIN 912 Hexagonal Bolt with Cup Head, Half Round Head, and Flat Head, Grade Options Available
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China Suppliers Factory DIN 912 Hexagonal Bolt with Cup Head, Half Round Head, and Flat Head, Grade Options Available

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!

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As a leading supplier in China, we offer high-quality internal hexagonal screws that are essential in various machinery applications. These screws are designed for easy tightening and disassembly, significantly reducing the chances of slipping. Our internal hexagonal wrenches are ergonomically crafted, typically bent at a 90° angle, featuring a longer end for optimal torque and a shorter end for increased control. This design allows users to apply significant force while tightening screws, ensuring a secure fit. The longer end's round head and flat head provide ease of insertion into screw holes, facilitating quick disassembly.

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While external hexagonal wrenches may be more cost-effective and preferred for certain applications due to their thinner screw head design, internal hexagonal screws are indispensable for machinery requiring higher precision and tighter fittings. As a trusted factory in China, we pride ourselves on supplying a range of screws tailored to diverse operational needs, catering to both high precision and low power intensity machinery. Experience the benefits of our internal hexagonal screws and choose us for reliable quality and performance.

    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 & Anti-Loosening

    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 (FAQ)

    Q What materials are commonly used to manufacture hex screws?
    Q235 wire and iron screw wire are commonly used. The choice of wire material directly determines the core characteristics and performance of the hex screws.
    Q How does the hardness of iron hex screws compare to stainless steel ones?
    Iron hex screws have a naturally softer texture compared to stainless steel. To reach the required hardness, iron screws must undergo a hardening heat treatment process.
    Q What precautions should be taken when using hex screws?
    It is important to avoid letting the screw head slip during operation. If the head slips, it will become extremely difficult to remove the screw in the future.
    Q Why do internal hexagonal bolts have excellent anti-loosening properties?
    Due to the precise tightening of the thread, they prevent loosening caused by long-term vibration in mechanical equipment. They can also be paired with locking washers or locking agents for extra security.
    Q What tools are needed to install internal hexagonal bolts?
    Only an internal hexagonal wrench (hex key) is required for installation, making the process simple, convenient, and cost-effective.
    Q In which industries are hexagonal bolts typically used?
    They are widely applied across various fields, including the automotive industry, aerospace, mechanical manufacturing, and construction engineering.