ISO U Bolt | Pipe Clamp U Shape Bolts | Round Bend Fasteners | GFM-WCR System
lisa@lzfasteners.com
In the global fastener landscape, ISO Compliant U-Bolts refer to round steel straps engineered with ISO metric threads and material properties. While there is no single ISO dimensional standard exclusively for U-bolts, these components are manufactured to align with the ISO 261 general-purpose metric screw threads and ISO 898 mechanical property classes to ensure seamless integration into international piping and structural systems.
For global procurement, "ISO U-Bolts" typically adopt the geometric specifications of DIN 3570 (the most recognized metric U-bolt profile) while strictly adhering to ISO testing and quality protocols for heavy industrial and solar infrastructure applications.
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The engineering focus for ISO-compliant U-bolts is Thread Integrity and Load Compatibility. By utilizing ISO 965 tolerance classes (typically 6g), these fasteners ensure a precise fit with ISO 4032 nuts. This system approach prevents common installation issues such as galling (especially in stainless steel) or thread stripping under the high torque required for large-diameter pipe clamping.
- Thread Standard: ISO 261 / ISO 965 (Metric).
- Mechanical Properties: ISO 898-1 (Grades 4.8, 8.8, 10.9).
- Dimensional Reference: DIN 3570 (Adoption for metric geometry).
- Surface Quality: ISO 10683 (Zinc Flake) / ISO 1461 (HDG).
| System Property | ISO Compliance Detail |
|---|---|
| Thread Tolerance | ISO 965 (6g / 6H) |
| Mechanical Class | ISO 898-1 (Classes 4.8 / 5.8 / 8.8 / 10.9) |
| Materialien | Carbon Steel, Stainless Steel (ISO 3506 A2/A4) |
| Surface Finish | Hot Dip Galv, Zinc, Zinc Flake (Chrome-free) |
| Pipe Compatibility | ISO 4200 (Metric Steel Tubes) |
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