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| 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 | - | - | ||
| 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
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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.
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Main Shapes: Semi-circular, right angled square, triangle, oblique triangle, etc.
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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.
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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
QWhat is a DIN 3570 U-bolt used for?
DIN 3570 U-bolts are primarily used to secure water pipes, pipe fittings, and structural plates to fixed surfaces. Typical applications include automotive leaf spring assemblies, mechanical connections, and infrastructure projects such as vehicles, ships, bridges, tunnels, and railways.
QWhat shapes are DIN 3570 U-bolts available in?
DIN 3570 U-bolts are available in several standard shapes: semi-circular, right-angled square, triangular, and oblique triangular. Each shape is suited to different pipe profiles and structural mounting requirements.
QWhat is the difference between Type A and Type B in DIN 3570?
Type A is the standard full-weight version designed for heavy-duty applications, while Type B is a lighter variant for less demanding loads. For larger nominal diameters (d ≥ 176 mm), only Type A is specified under the DIN 3570 standard.
QHow do I choose the correct DIN 3570 U-bolt size for my pipe?
Refer to the d₁ (inner diameter range) column in the specification table and match it against your pipe's outer diameter. The table includes both metric (mm) and English (inch) pipe size equivalents to simplify cross-reference and selection.
QWhat materials are DIN 3570 U-bolts typically made from?
DIN 3570 U-bolts are commonly manufactured from carbon steel, stainless steel, or galvanized steel. Material selection should account for the operating environment, required load capacity, corrosion resistance, and compressive strength to ensure long-term reliability.
QDo DIN 3570 U-bolts provide anti-loosening or seismic resistance?
Yes. DIN 3570 U-bolts are engineered with both seismic resistance and anti-loosening performance, making them well-suited for vibration-intensive environments including automotive suspension systems, railway track installations, and heavy industrial machinery.