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China U-Bolts Suppliers - Galvanized U-Bolts, Double Headed Bolts & Customized Irregular U-Bolts from Factory
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China U-Bolts Suppliers - Galvanized U-Bolts, Double Headed Bolts & Customized Irregular U-Bolts from Factory
U-shaped bolts are essential fastening solutions widely utilized in various applications, particularly for connecting and securing components with U-shaped grooves. These uniquely designed bolts provide enhanced strength and stability, making them ideal for fixing demands. Commonly found in industries such as construction and manufacturing, U-bolts are frequently used to secure pipe supports, coordinate measuring instruments, and a variety of other equipment and structures that require specialized connections. Our factory in China produces high-quality U-bolts, ensuring durability and reliability. As a leading supplier, we are committed to delivering the best U-bolt solutions to meet your specific needs. Choose our China-based factory for top-notch U-bolts that guarantee optimal performance and security
📌 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
20
25
32
40
50
65
80
100
125
English
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
4"
-
b
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
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 (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
150
175
200
250
300
350
400
500
d1
English
-
-
-
-
-
-
-
-
b
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
L1
217
249
283
334
385
435
487
589
n
192
218
248
302
352
402
452
554
100 piece weight (kg)
Type A
83.4
95.8
169.8
202.8
235
382
429
522
Type B
-
-
-
-
-
-
-
-
Purpose, Shape & Application Areas
🔍 U-Bolt Usage: Primarily used for water pipes and other fixed pipe fittings or plates, automotive steel plate springs, mechanical connections, vehicles, ships, bridges, tunnels, and railways.
🔒 Main Shapes: Semi-circular, right-angled square, triangle, oblique triangle, etc.
Key Application Areas
Truck chassis and frame stabilization (leaf spring connections).
Construction and installation of structural components.
Mechanical component connections in industrial equipment.
Infrastructure including vehicles, ships, bridges, and tunnels.
Modern industrial fields requiring easy maintenance and replacement.
Demanding environments requiring seismic performance and anti-loosening.
⚠️ Selection Considerations: Factors such as material, density, strength, and compressive strength must be evaluated to ensure environmental compatibility.
Frequently Asked Questions
QWhat is a DIN 3570 U-bolt used for?
DIN 3570 U-bolts are primarily used for securing water pipes and pipe fittings to surfaces or structures. They are widely applied in construction, automotive, mechanical engineering, and infrastructure like bridges and railways.
QWhat are the available shapes of U-bolts?
U-bolts are available in several shapes including semi-circular (round), right-angled square, triangular, and oblique triangular forms. The semi-circular shape is the most common for pipe clamping.
QWhat is the difference between Type A and Type B U-bolts?
Type A U-bolts are heavier and used for larger load-bearing applications. Type B U-bolts are lighter and only available for smaller diameter sizes. Type A consistently has a higher weight per 100 pieces.
QWhat materials are DIN 3570 U-bolts made from?
They are commonly manufactured in steel. Material selection should consider density, tensile strength, and corrosion resistance based on the specific application environment.
QWhat pipe sizes are compatible with these U-bolts?
Compatible sizes range from metric DN20 (3/4") up to DN500. English pipe sizes from 3/4" to 4" are also supported for specific nominal diameters.
QDo U-bolts provide anti-vibration or seismic resistance?
Yes, U-bolts are designed with seismic performance and anti-loosening functions, making them reliable for systems subject to vibration or dynamic loads.
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