LOCTITE 277
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
- M25 Bolt/Stud Threadlocking
- High-Strength Thread Retention
- Medium-Viscosity Threadlocking Application
Product Description
LOCTITE® 277 is a high-strength anaerobic threadlocking adhesive designed for the permanent locking and sealing of threaded fasteners. The one-component acrylic formulation cures when confined between closely fitting metal surfaces in the absence of air, preventing loosening and leakage caused by shock, vibration and dynamic loading. LOCTITE 277 is particularly suited for large bolts and studs (M25 and larger) where maximum holding power is required. The cured adhesive delivers excellent resistance to oils, fuels, chemicals and environmental exposure while maintaining reliable performance across a wide temperature range. Its fluorescent properties under UV light also support inspection and quality-control processes. High-strength threadlocker for permanent locking and sealing applications.
- Prevents loosening caused by vibration, shock and dynamic loads.
- Specifically designed for large bolts and studs (M25 and larger).
- One-component anaerobic formulation requiring no mixing.
- Fluorescent under UV light for inspection purposes
- Excellent resistance to motor oil, fuel, brake fluid, water/glycol mixtures and chemicals.
- Suitable for demanding industrial, maintenance and heavy-equipment applications.
Recommended Applications
- Permanent locking of large threaded fasteners.
- Heavy-duty industrial equipment and machinery.
- Large bolts, studs and structural assemblies.
- Equipment exposed to vibration and dynamic loading.
- Applications requiring high resistance to chemicals and fluids.
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 adhesive |
| Color | Red | — | Liquid |
| Fluorescence | Positive Under UV Light | — | Inspection aid |
| Specific Gravity | 1.12 | — | 25°C |
| Brookfield Viscosity | 6,000 - 8,000 | mPa·s | RVT, spindle 4, 20 rpm, 25°C |
| Strength Classification | High | — | Threadlocking adhesive |
| Flash Point | 165 | °C | Cleveland Open Cup |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Breakaway Torque | 32 | N·m | ISO 10964, M10 steel nuts and bolts, 24 h @ 22°C |
| Prevail Torque | 32 | N·m | ISO 10964, M10 steel nuts and bolts, 24 h @ 22°C |
| Breakloose Torque | 38 | N·m | ISO 10964, pre-torqued to 5 N·m |
| Maximum Prevail Torque | 40 | N·m | ISO 10964, pre-torqued to 5 N·m |
| Compressive Shear Strength | ≥9 | N/mm² | ISO 10123, steel pins and collars |
| Coefficient of Thermal Expansion | 80 × 10⁻⁶ | K⁻¹ | ISO 11359-2 |
| Thermal Conductivity | 0.1 | W/(m·K) | ISO 8302 |
| Cold Temperature Capability | -75 | °C | Tested minimum temperature |
| Chemical Resistance | Excellent | — | Resists motor oil, gasoline, brake fluid, ethanol and industrial chemicals |
