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LOCTITE® 263
Features and Benefits
Designed for high-strength permanent locking and sealing of threaded fasteners. Removable with heat.
LOCTITE® 263 is a red, high strength, primerless threadlocker for permanently locking and sealing bolts, nuts and studs to prevent loosening due to vibration. It works on all metals without primer, including passive substrates such as stainless steel, aluminum and plated surfaces. Suitable for use on most oil-coated, 'as-received' fasteners without cleaning.
- Ideal for heavy duty applications, such as studs into motor housings, where high strength is required
- Prevents fastener loosening and leakage from shock and vibration
- Permanent locking and sealing of threaded fasteners - removable with heat
- Requires heat for disassembly
- High temperature performance (up to 182°C / 360°F) and oil tolerance
Documents and Downloads
Looking for a TDS or SDS in another language?
Technical Information
| Agency approvals / certificates / specifications | NSF/ANSI-norm 61 |
| Application method | Dispense system, Manual |
| Application temperature | -65.0 - 360.0 °F (-55.0 - 180.0 °C ) |
| Applications | Threadlocking |
| Breakaway torque, M10 Steel Nuts/Bolts | 33.0 N·m (290.0 in./lb. ) |
| Color | Red |
| Cure type | Anaerobic cure |
| Fixture time | 10.0 min. |
| Key characteristics | Disassembly: disassembly with heat, Fluorescent, General purpose, Oil tolerant, Primerless, Strength: high strength |
| Physical form | Liquid |
| Prevail torque, M10 Steel Nuts/Bolts | 33.0 N·m (290.0 in./lb. ) |
| Recommended for use with | Metal, Metal: passive metal |
| Specific gravity, @ 25.0 °C | 1.1 |
| Viscosity, 20 RPM | 500.0 mPa·s (cP) |
How to
Step by Step Guide
1. Preparation - Cleaning
LOCTITE® 263 is suitable for use on most “as-received” fasteners with light coatings of corrosion prevention oils without cleaning. However, for heavily oiled or contaminated fasteners, it is recommended to use LOCTITE® SF 7070 to degrease and clean surfaces prior to applying LOCTITE 263 threadlocker.
2. Preparation - Activation
If cure speed is too slow due to passive metals (stainless steel, aluminum and plated metals) or low temperature (below 5°C), use LOCTITE SF 7649 activator. Allow to dry.
3a. Application - Through Hole
Apply a few drops of liquid threadlocker to the thread engagement area. Assemble nut and tighten to proper torque.
3b. Application - Blind Hole
Apply several drops of liquid threadlocker into lower third of blind hole, as well as a few drops onto male threads, and then install male threads. Tighten to proper torque.
4. Assembly
Assemble and tighten to proper torque requirement. If several bolts are being assembled, torque them down to the correct value within the fixture time window.
5a. Disassembly - Hand Tools
Disassemble with standard hand tools.
5b. Disassembly - Heat
If disassembly is not possible using normal hand tools, apply localized heat to approximately 500°F/260°C. Disassemble while hot with standard hand tools.
Equipment
For manual dispensing, the use of LOCTITE® EQ Pro Pump (for 50ml and 250ml bottles) or LOCTITE® Peristaltic Hand Pumps (50 ml or 250 ml versions) is recommended to ensure a consistent application volume.
Hint
For the disassembly of corroded or seized parts, use LOCTITE® LB 8040 Freeze and Release.
Frequently Asked Questions
What products can I use to prevent vibration loosening of parts? How do I prevent vibration loosening and leak paths?
What temperatures can LOCTITE® anaerobic threadlockers/thread sealants/gasketing materials withstand?
Are LOCTITE® anaerobic threadlockers/sealants/gasketing materials resistant to fluids such as gasoline, diesel, engine oil, water, glycol, acids, alkalis, hydraulic fluid, etc.?
Can LOCTITE® anaerobic threadlockers be used as thread sealants? Can LOCTITE anaerobic thread sealants be used as threadlockers?
LOCTITE® 263
Designed for high-strength permanent locking and sealing of threaded fasteners. Removable with heat.