LOCTITE 263
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
- High-Temperature Thread Retention
Product Description
LOCTITE® 263™ is a high-strength anaerobic threadlocking adhesive engineered 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 and vibration. LOCTITE 263 is particularly suited for heavy-duty applications such as studs installed into motor housings, nuts on pump housing studs and other assemblies requiring high-strength retention. The adhesive delivers reliable curing performance on both active metals such as brass and copper and passive substrates including stainless steel and plated surfaces. It also provides high-temperature performance and tolerates minor contamination from industrial oils, lubricants and corrosion-protection fluids.
Key Features & Benefits
- High-strength anaerobic threadlocker for permanent fastener locking.
- Prevents loosening and leakage caused by vibration and shock.
- Suitable for active and passive metal substrates including stainless steel and plated surfaces.
- Oil-tolerant formulation performs on lightly contaminated surfaces.
- Excellent high-temperature resistance for demanding applications.
- One-component adhesive requiring no mixing.
- Visible under UV light for inspection and quality control.
Recommended Applications
- Permanent locking and sealing of threaded fasteners.
- Stud installation in motor housings.
- Nuts and studs in pump housings.
- Heavy-duty industrial equipment assembly.
- Threaded connections exposed to vibration, heat and industrial 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 |
| Color | Red | — | Liquid |
| Strength Classification | High | — | Threadlocking adhesive |
| Fluorescence | Positive | — | Visible under UV light |
| Specific Gravity | 1.10 | — | 23°C |
| Brookfield Viscosity | 500 | mPa·s | 25°C, spindle 2, 20 rpm |
| Cone & Plate Viscosity | 450 | mPa·s | 25°C, shear rate 129 s⁻¹ |
| Flash Point | 107 | °C | Cleveland open cup |
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Breakaway Torque | 33 | N·m | M10 steel nuts & bolts, 24 h @ 23°C |
| Prevail Torque | 33 | N·m | M10 steel nuts & bolts, 24 h @ 23°C |
| Breakloose Torque | 39 | N·m | M10 steel nuts & bolts, pre-torqued to 5 N·m |
| Prevail Torque (Pre-Torqued) | 25 | N·m | M10 steel nuts & bolts, pre-torqued to 5 N·m |
| Breakloose Torque After 1 Week | 46 | N·m | M10 zinc phosphate nuts & bolts |
| Compressive Shear Strength | ≥9.0 | N/mm² | ISO 10123, steel pins and collars |
| Cold Temperature Capability | -75 | °C | Tested minimum temperature |
| Heat Resistance | Up to 200 | °C | Heat aging performance evaluated |
