Huitian 7263 (Original code HT2631, equivalent to Loctite 263) is high-strength permanent anaerobic thread locker in red fluorescent liquid. It features superior oil tolerance and ultra-high fastening strength, suitable for heavy-duty oily bolts. It cures inside oxygen-free thread gaps, integrating locking, sealing and rust prevention functions, with outstanding resistance to severe vibration. Disassembly requires high-temperature heating plus hand tools, widely applied for lifelong anti-loosening assembly in automobile, heavy industry and hydraulic equipment.
Core Technical Parameters
– Appearance: Red fluorescent low-viscosity liquid
– Chemical composition: Methacrylate anaerobic resin system
– Viscosity: 400~600 mPa·s, moderate fluidity
– Max gap filling: 0.13mm
– Fixture time: ≤20 mins at 23℃ ambient temperature; fully cured within 24 hours
– Breakaway torque: 20 N·m; Removable torque: 13 N·m
– Continuous service temperature: -50℃ ~ 150℃
– Applicable thread size: M6 ~ M20 metal bolts
– Packages: 50ml bottle, 250ml large industrial bottle
– Features: Fluorescent detectable, excellent oil tolerance for oily thread surfaces
Key Product Advantages
1. High-strength permanent locking: Far stronger clamping force than 7262, prevents loosening under continuous bumping and heavy impact; disassembly needs heating at 220~260℃, not applicable for regularly maintained fasteners;
2. Premium oil-tolerant formula: Cures steadily on threads with residual lubricating oil without thorough degreasing, ideal for mass production workshops; excellent curing performance on inert metals like stainless steel and aluminum alloy;
3. Fluorescent inspection function: Visible under UV lamp to check glue coating integrity, convenient for quality inspection in precision manufacturing;
4. Comprehensive chemical & corrosion resistance: Stable against engine oil, diesel, coolant, hydraulic fluid and moisture, avoids thread rust seizure and fluid leakage;
5. Wide substrate compatibility: Works perfectly on cast iron, carbon steel, stainless steel, galvanized steel and aluminum alloy;
6. Triple protection for threads: Anti-vibration loosening, fluid sealing and rust isolation.
Main Applications
1. Permanent fastening for cylinder head studs, flywheel bolts and turbo fasteners on heavy trucks and coaches;
2. Heavy-load thread locking for reducers, hydraulic valves and traveling mechanisms of excavators and mining machinery;
Our experienced engineers and technical specialists are here to provide professional guidance, product selection, and application support tailored to your specific requirements.