Products · Bent bolts
U bolts
Specialist U bolts made to order to DIN 3570 or your designs and drawings, in high temperature grades, super duplex and critical stainless steels.
DIN 3570
Or your own design and drawing
1 to 500
Single prototypes to batches of several hundred
UK, EU, US
Mill origin of every bar we use
3.1 / 3.2
EN 10204 certificates with full traceability
About U bolts
Specialist U bolts for demanding service
U bolts are bolts bent into a U shape, threaded on both legs, that wrap around a pipe, bar or axle and clamp it to a structure with a plate and nuts. HAGUE FASTENERS makes U bolts in the UK for the high end of the market: specialist U bolts made to order.
Our strength is in high temperature grades, super duplex and critical stainless steels, for pipe supports in power plant, offshore platforms and chemical works where a standard galvanised U bolt would not last.
Where U bolts are used
- Pipe supports and pipe clamps
- Offshore and subsea pipework
- High temperature steam lines
- Vehicle axles and leaf springs
- Structural and cable tray fixings
Options
Typical specifications
Typical options. We make to the standard or drawing you specify.
| Option | What we make |
|---|---|
| Form | Round or square bend, inside width and leg length to drawing, with plates and nuts |
| Thread | Metric coarse and fine, UNC, UNF, UN, BSW, BSF and special forms, cut or rolled |
| Strength | Mild steel, alloy steels, stainless A2 and A4, or to specification |
| Standards | DIN 3570, or your drawing |
| Finishes | Self colour, zinc, zinc nickel, zinc flake (Geomet, Delta Protekt), hot dip galvanising, electroless nickel, PTFE fluoropolymer, phosphate or passivation |
| Documentation | Certificate of conformity, EN 10204 3.1 or 3.2, test reports, dimensional reports and FAIR |
Materials
Materials we use
Certified bar from UK, EU and US mills. See all fastener materials.
- Carbon and alloy steels: mild steel, EN8, EN16 and alloy steels
- Stainless steels: 304, 316, 310, 321 and B8M
- Duplex and super duplex: S31803, S32750 and S32760
- Inconel: 600 and 625
- Incoloy: 800HT and 825
- Monel: 400
Manufacture and quality
Made in Willenhall, certified to release
Made to your design in our Willenhall facility from certified UK, EU and US bar, then threaded and inspected with calibrated gauges.
- Heat numbers traced from mill to release
- Heat treatment, NDT and coating by approved partners
- UKAS-accredited testing where specified
Questions
Frequently asked questions
What are U bolts used for?
U bolts clamp pipes, bars and axles to a support or structure. The U wraps around the part, and nuts on both legs pull it tight against a plate or bracket.
What standard covers U bolts?
DIN 3570 is the main metric standard for pipe U bolts. Many U bolts are made to project or OEM drawings, and we make both.
Can you make U bolts in super duplex?
Yes. We make U bolts in duplex and super duplex S32750 and S32760 for offshore and seawater pipework.
Do you make high temperature U bolts?
Yes. We make U bolts in heat resisting stainless steels, Incoloy 800HT and Inconel for hot pipework and plant.
U bolt enquiry?
Send us the drawing or the standard
Send the drawing with the pipe size, material and quantity, and we will quote quickly.