LOCTITE 271
Harmonization Code : 3506.10.00.00 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg
Main features
- High-Strength Thread Retention
- Low-Viscosity Threadlocking Application
- Large Threaded-Fastener Locking
Product Description
LOCTITE® 271™ is a high-strength anaerobic threadlocking adhesive formulated for the permanent locking and sealing of threaded metal fasteners. The one-component acrylic adhesive cures when confined between closely fitting metal surfaces and isolated from air, preventing loosening and leakage caused by vibration, shock and dynamic loading. LOCTITE 271 is particularly suitable for large bolts and studs up to M25 and provides excellent retention strength for applications where disassembly is not intended. The low-viscosity formulation delivers dependable performance across a wide range of industrial environments while offering resistance to oils, fuels, solvents and elevated temperatures.
Key Features & Benefits
- High-strength threadlocker for permanent fastener locking and sealing.
- Prevents loosening caused by vibration, shock and impact loads.
- Suitable for large threaded fasteners and studs up to M25.
- Low-viscosity formulation promotes efficient thread penetration.
- One-component anaerobic adhesive requiring no mixing.
- Resistant to oils, fuels, solvents and industrial fluids.
- Fluorescent under UV light for inspection and quality verification.
Recommended Applications
- Permanent locking of threaded fasteners.
- Large bolts, studs and heavy-duty threaded assemblies.
- Industrial machinery and equipment assembly.
- Automotive and transportation maintenance applications.
- Threaded joints exposed to vibration and dynamic loads.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Acrylic | — | Anaerobic threadlocker |
| Chemical Type | Dimethacrylate Ester | — | One-component |
| Color | Red | — | Liquid |
| Strength Classification | High | — | Threadlocking adhesive |
| Fluorescence | Positive | — | Visible under UV light |
| Specific Gravity | 1.10 | — | 25°C |
| Viscosity | 400 - 600 | mPa·s | Brookfield RVT, spindle 1, 10 rpm, 25°C |
| Flash Point | >100 | °C | See SDS |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Breakaway Torque | 17 - 40 | N·m | ISO 10964, M10 steel nuts and bolts, 24 h @ 22°C |
| Prevail Torque | 23 - 40 | N·m | ISO 10964, M10 steel nuts and bolts, 24 h @ 22°C |
| Breakaway Torque (90 min) | 8.5 - 25.4 | N·m | ISO 10964, steel nuts and bolts, 90 min @ 22°C |
| Prevail Torque (90 min) | 16.9 - 34 | N·m | ISO 10964, steel nuts and bolts, 90 min @ 22°C |
| Heat Resistance | Up to 150 | °C | Hot strength testing |
| Chemical Resistance | Excellent | — | Resists motor oil, fuels, brake fluid, ethanol and solvents |
| Strength Retention in Motor Oil | 75 | % | After 1,000 h exposure at 125°C |
| Recommended Disassembly Temperature | 250 | °C | Apply localized heat before removal |
