Fasto A170 – Maximum Strength Threadlocking for Heavy-Duty Assemblies
Fasto A170 is a single-component, high-strength (permanent) anaerobic threadlocking compound formulated to lock metal fasteners and prevent vibration loosening and leakage through threads. It cures in the absence of air when confined between close-fitting metal surfaces, delivering maximum locking strength for critical industrial and automotive applications.
Designed for medium to coarse threaded fasteners, Fasto A170 is particularly suitable for large bolts, studs, and foundation fasteners where permanent retention and reliability are required.
Permanent High Strength Threadlocking Breakaway torque up to 29 Nm and prevailing torque up to 33 Nm (M10 steel fasteners).
Anaerobic Cure Technology Controlled curing only within metal threads—no surface curing.
Fast Fixture Time Achieves handling strength in approximately 15 minutes.
Wide Operating Temperature Range -50°C to +150°C (continuous).
Good Gap Filling Capability Effective up to 0.20 mm.
Excellent Chemical & Solvent Resistance Resists oils, fuels, brake fluid, alcohols, water, and common solvents.
Corrosion Protection Prevents rust and fretting on assembled fasteners.
Green Colour Easy visual identification during application and inspection.
Benefits
Prevents vibration-induced loosening in heavy machinery
Ensures leak-free, permanent threaded joints
Reduces maintenance and re-tightening
Enhances safety and reliability of structural fasteners
Ideal for critical, load-bearing assemblies
Primary Application
Sub-Applications
Functional Purpose
Key Performance Advantage
Permanent Thread Locking
Medium to coarse threaded screws, nuts & bolts
Prevent loosening and leakage permanently
Very high breakaway & prevailing torque
Large Fastener Locking
Studs, large diameter bolts
Secure critical fasteners
Designed for larger threaded assemblies
Heavy Industrial Assemblies
Conveying systems, foundation bolts
Maintain joint integrity under load
High vibration & shock resistance
Automotive Chassis & Structural Fasteners
Chassis bolts, load-bearing automotive joints
Long-term fastening reliability
Permanent locking for safety-critical joints
Machinery & Equipment Mounting Bolts
Mounting bolts, housing fasteners
Prevent back-out during operation
Thixotropic – no run-off or migration
Leak Prevention in Threaded Joints
Threaded joints exposed to fluids
Seal threads against leakage
Anaerobic cure fills micro-gaps
Corrosion Protection of Threads
Industrial & outdoor fasteners
Protect assembled threads
Seals out moisture and contaminants
Surface Preparation Ensure all mating surfaces are clean, dry, and free from dust, grease, oil, or other contaminants. Proper surface cleanliness is essential to achieve optimum bonding and curing performance.
Application Apply the adhesive evenly to the engaged or bonding area as required. For threaded applications, apply the product to the male threads, ensuring adequate coverage without excessive overflow.
Assembly Assemble the parts immediately after application. Tighten or position components as per the required specification. Excess adhesive, if any, should be wiped off from the external joint area.
Curing Allow the assembly to remain undisturbed until sufficient handling strength is achieved. Full cure is attained after the recommended curing time under ambient conditions.
Lower temperatures may slow the curing process
Heating the assembly can accelerate curing if required
Post-Assembly (If Applicable) Certain low-viscosity grades may be applied after assembly to wick into pre-assembled joints. Refer to the product-specific TDS for suitability.
Activator Usage (Optional) For low temperatures, inactive substrates, or large gaps, a suitable Fasto Activator may be used to accelerate curing. Note: Use of activator may slightly reduce final bond strength.
Handling & Storage Store the product in a cool, dry place, away from direct sunlight, within the recommended temperature range. Ensure containers are properly closed when not in use.
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