In industrial assemblies, loose fasteners can lead to equipment failure, leakage, and costly downtime. This is where thread locking adhesive becomes essential. Designed to secure threaded fasteners, these adhesives prevent loosening caused by vibration, shock, and thermal expansion.
Whether used in automotive, electrical, or heavy machinery, thread lockers ensure long-term reliability and safety in critical applications.
What is a Thread Locking Adhesive?
A Thread Locking Adhesive is a single-component anaerobic adhesive applied to threaded metal fasteners (bolts, nuts, screws). It cures in the absence of air and in the presence of metal ions, forming a strong bond that locks threads in place.
This prevents:
- Self-loosening due to vibration
- Leakage through threaded connections
- Corrosion and rust formation
Fasto Thread Locking Adhesives
Fasto thread lockers are engineered to provide reliable fastening, anti-vibration performance, and long-term durability across industrial applications.
Key Characteristics
- Anaerobic curing mechanism
- Available in multiple strength grades
- Suitable for various thread sizes
- Resistant to oils, chemicals, and temperature variations
Types of Thread Locking Adhesives
1. Low Strength
- For small fasteners (up to M6)
- Easy disassembly using hand tools
- Ideal for electronics and precision component
2. Medium Strength
- Removable with standard tools
- Suitable for general industrial applications
- Most commonly used grade
3. High Strength
- Permanent locking for heavy-duty applications
- Requires heat or special tools for removal
- Used in critical assemblies
Applications of Thread Locking Adhesives
Thread locking adhesives are widely used across industries:
- Automotive Industry – Engine components, transmission bolts
- Electrical & Electronics – Panel screws, circuit assemblies
- Heavy Machinery – Pumps, compressors, gear systems
- Construction Equipment – Structural fasteners
- LED & Lighting Industry – Fixture assemblies and housing components
Key Benefits & Performance Advantages
✔ Prevents loosening due to vibration
✔ Eliminates need for lock washers or mechanical locking devices
✔ Provides sealing against leakage
✔ Protects threads from corrosion
✔ Improves assembly reliability and lifespan
Direction of Use
Surface Preparation
- Clean threads to remove oil, dust, and contaminants
- Use suitable solvent or cleaner for best results
Application
- Apply adhesive directly onto male threads
- Assemble parts and tighten as required
Curing
- Initial fixture time: 10–20 minutes (depending on grade)
- Full cure: 24 hours for maximum strength
Joint & Sealing Guidelines
- Ensure proper thread engagement
- Avoid over-application to prevent excess squeeze-out
- Use appropriate grade based on load and removal requirements
- For passive metals (like stainless steel), use activator if needed
How to Choose the Right Thread Locking Adhesive
Selecting the right product depends on:
1. Strength Requirement
- Removable vs permanent locking
2. Fastener Size
- Smaller threads require lower strength
3. Operating Conditions
- Temperature, vibration, and exposure to chemicals
4. Material Type
- Active metals (steel) vs passive metals (stainless steel, aluminum)
Application Table
Primary Application | Sub-Applications | Functional Purpose | Key Performance Advantage |
Thread Locking | Bolts, Nuts, Screws | Prevent loosening | Anti-vibration reliability |
Sealing | Threaded joints | Leak prevention | Airtight sealing |
Protection | Metal threads | Corrosion resistance | Extended lifespan |
A thread locking adhesive is not just an accessory—it’s a critical component for ensuring safety, durability, and efficiency in mechanical assemblies. By eliminating loosening, leakage, and corrosion, it enhances the overall performance of industrial systems.
Fasto Adhesives offers high-performance thread lockers designed to meet demanding industrial requirements, making them the ideal choice for secure and reliable fastening.
