Fasto A122 – Low Strength Threadlocker for Small & Serviceable Fasteners
Fasto A122 is a low-strength, thixotropic anaerobic threadlocker specially formulated to prevent vibration loosening of threaded components while allowing easy and frequent disassembly. It cures in the absence of air when confined between close-fitting metal threads, forming a secure yet removable bond.
Designed primarily for small threaded fasteners (<6 mm Ø) and soft non-ferrous metals, Fasto A122 delivers excellent vibration and shock resistance without the risk of fastener damage during removal.
Anaerobic Cure Technology Controlled curing only inside metal threads.
Thixotropic (Non-Drip) Formulation Prevents run-off on vertical or overhead assemblies.
Fast Fixture Time 4–10 minutes at room temperature.
Wide Operating Temperature Range -50°C to +150°C (continuous).
Excellent Chemical & Solvent Resistance Resistant to motor oil, petrol, brake fluid, acetone, alcohols, and water.
Purple Colour Easy visual identification of low-strength grade.
Benefits
Prevents vibration-induced loosening
Allows tool-free or low-torque disassembly
Ideal for small screws, set screws, and fine threads
Protects soft metals from thread stripping
Reduces maintenance time and fastener damage
Primary Application
Sub-Applications
Functional Purpose
Key Performance Advantage
Small Threaded Fastener Locking
Screws & bolts below Ø6 mm
Prevent loosening due to vibration
Low removal torque, easy disassembly
Set Screw & Keyed Fastener Retention
Set screws, hex & slot driven fasteners
Secure positioning of small components
Prevents vibration loosening without damage
Vibration & Shock Resistance for Threads
Fasteners exposed to dynamic loads
Maintains clamp load under vibration
Reliable locking with controlled strength
Serviceable Threaded Assemblies
Parts requiring regular maintenance
Allows repeated assembly & disassembly
Threads remain undamaged
Non-Ferrous Metal Fasteners
Aluminium, brass & softer metals
Safe locking on softer substrates
Reduced risk of thread stripping
Precision Mechanical Assemblies
Small mechanical & electrical assemblies
Controlled fastening security
Thixotropic, stays in place during assembly
General Industrial Fastener Locking
Light-duty industrial equipment
Prevents fastener back-out
Chemical & heat resistance
Surface Preparation
Ensure threads are clean, dry, and free from grease, oil, and contaminants.
Cleaning improves cure speed and bond reliability.
Application Method
Apply Fasto A122 to all engaged threads.
Assemble the fastener and tighten as required.
Allow curing under anaerobic (air-excluded) conditions.
Wipe off excess adhesive from outside the joint.
Curing Guidelines
Fixture time: 4–10 minutes
Full cure: 24 hours
Maximum recommended gap: 0.25 mm
Additional Notes
Cure speed depends on temperature, bond gap, and substrate type.
On inert metals (stainless steel, aluminium) or at temperatures below 5°C, use Fasto AP49 Activator to accelerate curing (may reduce final strength by up to 30%).
Not recommended for certain plastics due to possible stress cracking.
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