B8X-243 is a true industrial workhorse: a medium-strength threadlocker that performs reliably in real-world conditions where contamination from cutting fluids, anti-corrosion oils, or engine lubricants is unavoidable. Unlike many competitors, it bonds effectively to stainless steel, aluminum, zinc-plated, and passivated surfaces without requiring a primer or activator. Its thixotropic consistency ensures precise application and zero migration, making it ideal for vertical, overhead, or blind-hole assemblies in demanding mechanical environments.
Key Technical Specifications
| Parameter | Value |
|---|
| Viscosity | 2,150 cP |
| Color | Blue |
| Thixotropic | Yes |
| Max Recommended Fastener Size | M30 and smaller |
| Fixture Time | ~10 minutes |
| Breakaway Torque (M10 steel) | 26 N·m (230 lb·in) |
| Prevailing Torque (M10 steel) | 5 N·m (40 lb·in) |
| Service Temperature | –55°C to +180°C (–65°F to 360°F) |
| Packaging | 20 ml / 250 ml |
Note: Breakaway torque = torque required to initiate loosening; Prevailing torque = torque required to continue turning after breakaway.
Performance Highlights
- Oil-Tolerant Formula: Bonds reliably on threads contaminated with engine oil, cutting fluid, or rust-preventive coatings—no cleaning required in many cases.
- Universal Metal Compatibility: Works on carbon steel, stainless steel (including passive grades), aluminum, brass, and electroplated surfaces without activator.
- Tool-Removable After Cure: Full-strength lock can be disassembled using standard wrenches or sockets—no heat needed.
- High-Temperature Stability: Continuous service up to 180°C (360°F), suitable for engines, gearboxes, and hydraulic systems.
- Seals Against Leaks: Fills microscopic thread gaps to prevent fluid or gas leakage in pressurized systems.
Typical Applications
- Pumps & Compressors: Locking casing bolts and impeller shaft nuts
- Electric Motors & Gearboxes: Securing mounting bolts and coupling fasteners
- Hydraulic & Pneumatic Systems: Preventing loosening in high-vibration manifolds
- Machine Tools: Fixing toolholder screws, turret bolts, and spindle retainers
- Automotive & Heavy Equipment: Engine block bolts, transmission housings, suspension linkages
Application Guidelines
- For best results, apply directly to clean or lightly oiled threads.
- Apply to 2–3 threads of the male fastener or into the female tapped hole.
- Assemble immediately; handling strength in ~10 minutes, full cure in 24 hours.
- To disassemble, apply standard hand torque—no heating required for fasteners ≤ M30.
- Store upright at room temperature (<25°C); keep nozzle clean and cap sealed.
Why Choose B8X-243?
When your assembly faces oil, heat, vibration, and mixed-metal substrates, B8X-243 delivers dependable performance without over-engineering. It’s the smart, serviceable solution for industrial maintenance, OEM production, and repair shops worldwide.
Available in 20 ml (trial/workshop) and 250 ml (production) bottles.
Request a sample or compatibility report for your specific fastener material and lubricant environment.
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