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China Factory Suppliers of Galvanized U-bolts, Double Headed Bolts, and Customized Irregular U-bolts
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China Factory Suppliers of Galvanized U-bolts, Double Headed Bolts, and Customized Irregular U-bolts

U-shaped bolts are essential components widely used for connecting and securing members with U-shaped grooves. These bolts, with their unique design, provide enhanced strength for effective fixing. Common applications of U-bolts include connecting pipe supports, coordinating measuring instruments, and securing various equipment and structures that require specialized connections. As a leading manufacturer and supplier of U-shaped bolts in China, our factory ensures high-quality products tailored to meet your specific needs. Choose us for reliable and durable U-bolts for all your engineering requirements

    Din 3570 U Bolt U Wire U Clamp
    📐 DIN 3570 U-Bolt Dimensions — Small to Medium Sizes (mm)
    Nominal diameter d 30 38 46 52 64 82 94 120 148
    d1 25~26.9 30~33.7 38~42.4 44.5~48.3 57~60.3 76.1 88.9 108~114.3 133~139.7
    d1 Suitable for pipe size Metric system 20 25 32 40 50 65 80 100 125
    d1 English 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4" -
    b ① 40 40 50 50 50 50 50 60 60
    ds 10 10 10 10 12 12 12 16 16
    d3 M10 M10 M10 M10 M12 M12 M12 M16 M16
    L ① 70 76 86 92 109 125 138 - -
    L1 28 31 37 40 49 57 66 171 191
    n 40 48 56 62 76 94 106 136 164
    100 piece weight (steel) ≈ kg Type A 9.4 10.5 12 12.9 22.2 25.9 28.8 64 72.7
    Type B 6.8 7.7 9 9.7 16.8 19.8 22.4 - -
    📐 DIN 3570 U-Bolt Dimensions — Large Sizes (mm)
    Nominal diameter d 176 202 228 282 332 378 428 530
    d1 159~168.3 (191)~193.7 216~219.1 267~273 318~323.9 355.6~368 406.4~419 508~521
    d1 Suitable for pipe size Metric system 150 -175 200 250 300 350 400 500
    d1 English - - - - - - - -
    b ① 60 60 70 70 70 70 70 70
    ds 16 16 20 20 20 24 24 24
    d3 M16 M16 M20 M20 M20 M24 M24 M24
    L ① - - - - - - - -
    L1 217 249 283 334 385 435 487 589
    n 192 218 248 302 352 402 452 554
    100 piece weight (steel) ≈ kg Type A 83.4 95.8 169.8 202.8 235 382 429 522
    Type B - - - - - - - -
    🔩 Purpose, Shape & Application Areas of U-Bolts

    U-bolt usage: mainly used for water pipes and other fixed pipe fittings or plates, such as the construction and installation of automotive steel plate springs, mechanical connections, vehicles, ships, bridges, tunnels, railways, etc.

    Main shapes:

    • Semi-circular
    • Right angled square
    • Triangle
    • Oblique triangle

    Application areas: U-bolts are usually used in trucks to stabilize car chassis and frames. For example, leaf springs are connected by U-bolts. U-bolts have a wide range of applications, such as construction and installation, mechanical component connections, vehicles, ships, bridges, tunnels, railways, etc.

    In addition, U-bolts have been widely used in modern industrial fields, easy to install, maintain, and replace, and have seismic performance and anti-loosening function. When selecting and using U-bolts, factors such as material, density, strength, color, and compressive strength need to be considered to ensure that they can adapt to specific usage environments and requirements.

    Frequently Asked Questions (FAQ)
    Q What is a DIN 3570 U-bolt used for?
    DIN 3570 U-bolts are primarily used to fix water pipes, pipe fittings, and plates. They are widely applied in automotive steel plate spring installation, mechanical connections, vehicles, ships, bridges, tunnels, and railway construction.
    Q What shapes are DIN 3570 U-bolts available in?
    DIN 3570 U-bolts are available in several shapes including semi-circular, right angled square, triangle, and oblique triangle, allowing them to suit various pipe and structural configurations.
    Q What is the difference between Type A and Type B U-bolts?
    Type A U-bolts are generally heavier than Type B for the same nominal diameter, indicating a more robust construction. Type B is a lighter variant and is not available for larger nominal diameters (120mm and above in the small-to-medium range).
    Q What materials are DIN 3570 U-bolts made from?
    DIN 3570 U-bolts are commonly manufactured in steel. When selecting the right U-bolt, factors such as material, density, strength, color, and compressive strength should be considered to ensure suitability for the specific application environment.
    Q How do I select the correct U-bolt size for my pipe?
    Select the U-bolt based on the pipe's outer diameter (d₁). The dimension tables above list compatible pipe sizes in both metric and English (imperial) units. Match your pipe's outer diameter to the d₁ range to find the correct nominal diameter (d) and corresponding bolt specifications.
    Q Are DIN 3570 U-bolts suitable for seismic and anti-loosening applications?
    Yes. DIN 3570 U-bolts are widely used in modern industrial fields and are recognized for their seismic performance and anti-loosening function. They are easy to install, maintain, and replace, making them reliable for demanding structural and piping applications.