LOCTITE® 248 Threadlocker
Features and Benefits
Easy-to-apply, semi-solid stick for locking and sealing threaded assemblies - ideal for vertical and overhead applications. Medium strength, removable with hand tools.
LOCTITE® 248 is a blue, general purpose threadlocker that provides a medium-strength bond in a convenient stick format for no-drip, no-mess applications. It locks and seals bolts, nuts and studs to prevent loosening due to vibration, and works on all metals, including passive substrates such as stainless steel, aluminum and plated surfaces without the need for a primer. Suitable for use on most oil-coated, "as-received" fasteners without cleaning.
- Convenient, non-drip, stick format
- Prevents fastener loosening on vibrating assemblies, e.g. pumps, gear boxes, presses
- Works on all metals without primer, including passive substrates
- Suitable for use on most oil-coated, 'as-received' fasteners without cleaning
- Can be disassembled with ordinary hand tools for easy service and maintenance
Documents and Downloads
Looking for a TDS or SDS in another language?
Technical Information
| Application method | Swipe |
| Application temperature | -55.0 - 150.0 °C (-65.0 - 300.0 °F ) |
| Applications | Threadlocking |
| Breakaway torque, Breakloose torque, M10 Steel Nuts/Bolts | 23.0 N·m (200.0 in./lb. ) |
| Color | Blue |
| Cure type | Anaerobic cure |
| Fixture time | 5.0 min. |
| Key characteristics | Disassembly: removable, Strength: medium strength |
| Physical form | Semi-solid stick |
| Recommended for use with | Metal, Metal: passive metal |
How to
Step by Step Guide
1. Preparation - Cleaning
It is recommended to use LOCTITE SF 7063 or LOCTITE SF 7070 to degrease and clean surfaces prior to applying 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 360 degree band of threadlocker to the male fastener at the area of engagement and completely fill the thread roots - generally the width of 2-3 threads. Assemble nut and tighten to proper torque.
3b. Application - Blind Hole
Apply threadlocker to entire diameter of thread engagement area on male fastener, install fastener into blind hole, and 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.
5. Disassembly
Disassemble with standard hand tools. If not possible, apply localized heat to approximately 500°F/260°C and disassemble while hot.
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 threadlockers/thread sealants/gasketing materials work up to?
Are threadlockers/sealants/gasketing materials resistant to fluids such as gasoline, diesel, engine oil, water, glycol, acids, alkalis, hydraulic fluid, etc.?
Can threadlockers be used as thread sealants? Can thread sealants be used as threadlockers?
What health and safety (H&S) precautions do I need to take with this type of product?
LOCTITE® 248
Easy-to-apply, semi-solid stick for locking and sealing threaded assemblies - ideal for vertical and overhead applications. Medium strength, removable with hand tools.