Leave Your Message
China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections
Hot Products
Products Categories
Featured Products
black grey phosphate bugle head self tapping drywall screw for metal wood

black grey phosphate bugle head self tapping drywall screw for metal wood
Self Drilling Screws

Self Drilling Screws
Cross flange self tapping screw

Cross flange self tapping screw
Brass Copper DIN315 Triangle Butterfly Wing Nut

Brass Copper DIN315 Triangle Butterfly Wing Nut
Pull rivet nut

Pull rivet nut
Hexagon Socket Head Cap Bolt DIN 912

Hexagon Socket Head Cap Bolt DIN 912
White Blue Zinc Plated Galvanized DIN975 DIN976 Threaded Rod

White Blue Zinc Plated Galvanized DIN975 DIN976 Threaded Rod
Carriage bolt DIN603

Carriage bolt DIN603
Black zinc oxide CSK flat head hexagonal bolt screw

Black zinc oxide CSK flat head hexagonal bolt screw
Yellow Color Zinc Plated Hex Flange Bolt DIN6921

Yellow Color Zinc Plated Hex Flange Bolt DIN6921
0102030405
China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections
China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections
China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections
China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections
China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections
China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections

China Suppliers Factory Double-Headed Bolts 4.8/8.8 Grade - Galvanized & Blackened Options for Reliable Connections

Our double-headed bolts are specifically designed with the durability and reliability needed for frequent disassembly, making them an essential choice for various applications. Manufactured in China, our factory uses high-quality materials to ensure that these bolts maintain stability and prevent thread wear and damage. Additionally, our bolts are equipped with anti-loosening measures to withstand external loads, ensuring a secure connection every time. As trusted suppliers in the industry, we prioritize product quality and performance, delivering solutions that meet your needs.

    Contact us
    Product Detail

    Double head bolt shz2
    Thread size d M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33
    Designation ① D D D D D D D D D D D D D
    / / D-HDZ D-HDZ D-HDZ D-HDZ D-HDZ D-HDZ D-HDZ D-HDZ D-HDZ D-HDZ D-HDZ
    ds Max 5.32 7.16 8.99 10.83 12.66 14.66 16.33 18.33 20.33 22 25 27.67 30.67
    Min 5.14 6.97 8.78 10.59 12.41 14.41 16.07 18.07 20.07 21.69 24.69 27.34 30.34
    S Public 50 63 75 100 115 125 140 150 165 175 200 200 225
    Max 75 88 100 125 140 150 165 175 190 200 225 225 250
    Min 42 55 67 92 107 117 132 142 157 167 192 192 217
    Connecting nut M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33
    ⚙️ The Function of Double Headed Bolts
    • 🔩
      1. Connecting Mechanical Components

      Double headed bolts have threads at both ends and a screw in the middle, commonly used to connect mechanical components such as mining machinery, bridges, automobiles, motorcycles, boiler steel structures, suspension towers, large-span steel structures, and large buildings.

    • 🔧
      2. Installation Accessories

      When large equipment requires the installation of accessories, such as observation mirrors, mechanical seal seats, reduction frames, etc., double headed bolts can play a role. One end is screwed into the main body, and after installing the accessories, the other end is equipped with a nut. Due to the fact that these attachments may require frequent disassembly, using double headed bolts for replacement would be very convenient.

    • 🏗️
      3. Connecting Thick Plates & Restricted Areas

      In cases where the thickness of the connectors is large or the connection area is not convenient to use hexagonal bolts, such as concrete roof trusses, roof beam suspensions, monorail beam suspensions, etc., double headed bolts are also a suitable choice.

    • ⛓️
      4. Fixed Connecting Rod

      Double headed bolts are also commonly used for mechanical fixed connecting rods, with corresponding threads at both ends. The thickness of the middle screw varies depending on actual usage.

    ❓ Frequently Asked Questions
    Q What is a double headed bolt and how does it differ from a standard bolt?
    A double headed bolt (also called a stud bolt) features threads on both ends with an unthreaded shank in the middle. Unlike a standard bolt that has a head on one end, a double headed bolt is designed to be screwed into a tapped hole on one end and secured with a nut on the other, making it ideal for applications requiring frequent disassembly.
    Q What thread sizes are available for double headed bolts?
    Double headed bolts are available in a wide range of metric thread sizes, including M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, and M33, to accommodate various structural and mechanical requirements.
    Q What industries commonly use double headed bolts?
    Double headed bolts are widely used across multiple industries, including mining machinery, bridge construction, automotive and motorcycle manufacturing, boiler and steel structure fabrication, suspension towers, large-span steel structures, and large-scale building construction.
    Q What does the designation "D-HDZ" mean in the specification table?
    The designation "D-HDZ" refers to a specific surface treatment or product classification applied to double headed bolts from thread size M10 and above. "D" represents the standard designation, while "HDZ" typically indicates hot-dip galvanized treatment, providing enhanced corrosion resistance for outdoor or demanding environments.
    Q Why are double headed bolts preferred for thick plate connections?
    When connecting thick plates or working in confined spaces where a standard hexagonal bolt cannot be fully inserted or tightened, double headed bolts offer a practical solution. They are particularly suitable for concrete roof trusses, roof beam suspensions, and monorail beam suspensions where space constraints make conventional bolts impractical.
    Q How do I select the correct double headed bolt size for my application?
    Selecting the correct size involves considering the thread diameter (d), the shank diameter (ds), and the required screw-in length (S) based on the material and load requirements of your application. Refer to the specification table above for the maximum and minimum values of ds and S for each thread size, and consult with a structural engineer if needed to ensure safe and reliable connections.