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LOCTITE® 271
Features and Benefits
High strength, low viscosity, red, anaerobic-curing threadlocking adhesive for locking and sealing threaded fasteners.
LOCTITE® 271 is a red, low viscosity, high strength, anaerobic-curing threadlocking adhesive for the prevention of fastener loosening due to heavy shock and vibration. It can tolerate slight contaminations of industrial oils and is suitable for all metal fasteners. It fluoresces under UV light – great for quality control.
- Prevents unwanted movement, loosening, leaks and corrosion
- Low viscosity
- Fluorescent under UV for quality control
- High strength - removable with heat
- Seals threads - allows through-hole tapping
Documents and Downloads
Looking for a TDS or SDS in another language?
Technical Information
| Chemical basis / base | Methacrylate |
| Color | Red |
| Fixture time | 5.0 - 15.0 min. |
| Recommended for use with | Metal: brass, Metal: steel, Metal: steel - stainless steel |
| Viscosity, Brookfield - RVT, @ 25.0 °C Spindle 1, speed 10 rpm | 400.0 - 600.0 mPa·s (cP) |
How to
Step by Step Guide
1. Preparation - Cleaning
It is recommended to use LOCTITE® SF 7070 to degrease and clean surfaces prior to applying LOCTITE 271 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 activator LOCTITE® SF 7649 (see cure speed vs activator graph in the TDS).
3. Application
Apply liquid threadlocker to the engagement area. For manual dispensing, the use of a peristaltic handgun or the LOCTITE® Pro Pump is recommended to ensure a consistent application volume.
4a. Application - Through-Hole
Insert bolt and apply threadlocker to the exposed thread. Assemble nut and tighten to the correct/specified torque.
4b. Application - Blind Hole
Apply several drops of liquid threadlocker down the sides of the blind hole filling the lower third. Apply several drops to the bolt.
5. Assembly
Assemble and tighten. If several bolts are being assembled, torque them down to the correct value within the fixture.
6. Disassembly - Hand Tools
Disassemble with standard hand tools.
7a. Disassembly - Heat
If disassembly is not possible using normal hand tools, apply localized heat to approximately 250°C. Disassemble while hot.
7b. Disassembly After Heating - Hand Tools
Disassemble while hot with standard hand tools.
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® 271
High strength, low viscosity, red, anaerobic-curing threadlocking adhesive for locking and sealing threaded fasteners.