U Bolts
What are U Bolts?
U bolts are U-shaped fastenerswith threaded ends, designed to secure round objects such as pipes, tubes, or conduit to a surface. Their shape allows them to wrap around cylindrical objects and provide a firm grip when fastened with nuts.
Asiad Steel Industries is a trusted manufacturer, supplier, and exporter of premium U Bolts available in various sizes, grades, and finishes, offering secure and durable fastening solutions for diverse industrial, construction, and automotive applications worldwide.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Size | 6 mm to 200 mm diameter, lengths from 50 mm to 1000 mm (custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | PN6, PN10, PN16, PN25, PN40, PN64 | |
| Product Types | U Bolts | Round, Square, Adjustable, Custom shapes |
| Material Options | Carbon Steel Grades | CS 4.6, CS 8.8 |
| Stainless Steel Grades | SS 304, SS 316, SS 316L | |
| Alloy Steel | Alloy Steel 40Cr, 42CrMo | |
| Standards & Certifications | ASTM | ASTM A307, ASTM A194, ASTM F593 |
| ASME / ANSI | ASME B18.31.3, ASME B1.1 | |
| European Standards | EN ISO 898-1, EN 14399-4 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175 | |
| Design Features | Thread Type | Full Threaded, Partially Threaded, UNC, Metric |
| Bend Type | Semi-Circular, Square Bend | |
| Tolerance | As per ASTM / ASME / EN standards | |
| Coating & Surface Finish | Anti-Corrosion Coating | Hot Dip Galvanized, Zinc Plated, Phosphate Coating |
| Optional Coatings | PTFE, PVD, Powder Coating | |
| Surface Finish | Plain, Polished, Bead Blasted | |
| Testing & Inspection | Mechanical Testing | Tensile, Yield, Hardness |
| Pressure Testing | Hydrostatic, Pneumatic (where applicable) | |
| Non-Destructive Testing | Dye Penetrant (DPT), Ultrasonic (UT) | |
| Destructive Testing | Tensile, Hardness, Impact |
Dimensions
| Nominal Diameter (mm) | Thread Size | Bend Width (mm) | Bend Height (mm) | Thread Length (mm) | Leg Length (mm) | Approx. Weight (kg) |
|---|---|---|---|---|---|---|
| 6 | M6 | 20 | 30 | 25 | 50 | 0.03 |
| 8 | M8 | 25 | 40 | 30 | 60 | 0.05 |
| 10 | M10 | 30 | 50 | 35 | 75 | 0.09 |
| 12 | M12 | 35 | 60 | 40 | 90 | 0.14 |
| 16 | M16 | 50 | 80 | 50 | 120 | 0.32 |
| 20 | M20 | 60 | 100 | 60 | 150 | 0.60 |
| 24 | M24 | 70 | 120 | 70 | 180 | 0.95 |
| 30 | M30 | 90 | 150 | 90 | 225 | 1.70 |
| 36 | M36 | 110 | 180 | 110 | 270 | 2.60 |
| 42 | M42 | 130 | 210 | 130 | 315 | 3.90 |
| 48 | M48 | 150 | 240 | 150 | 360 | 5.50 |
| 56 | M56 | 180 | 280 | 180 | 420 | 7.90 |
| 64 | M64 | 200 | 320 | 200 | 480 | 10.5 |
| 72 | M72 | 220 | 360 | 220 | 540 | 14.0 |
| 80 | M80 | 250 | 400 | 250 | 600 | 18.0 |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 400 – 700 | MPa |
| Yield Strength | 200 – 400 | MPa |
| Hardness | 120 – 180 | HB |
| Elongation | ≥ 15 – 25 | % |
| Density | 7.8 – 8.0 | g/cm³ |
| Impact Toughness | ≥ 20 – 60 | J |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 200 – 400 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy) | – |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 180 | HB |
| Surface Finish | Hot-Dip Galvanized / Plain / Zinc Plated | – |
| Thread Type | Full Thread / Partial Thread | – |
| Operating Temperature Range | -40 to 400 | °C |
| Load Capacity | Based on Diameter & Grade | kN |
| Pressure Rating | N/A | – |
Chemical Composition
| Element | SS 304 | SS 304L | SS 316 | SS 316L |
|---|---|---|---|---|
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
Applications of U Bolts
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is a U bolt used for?
Do you offer stainless steel U bolts?
Are U bolts suitable for heavy-duty applications?
Can I get custom U bolt sizes?
