Huitian 7277 (Original Code HT2771, equivalent to Loctite 277) is high-strength permanent anaerobic thread locker customized for large assembly gaps, presented as red high-thixotropy viscous liquid with single-component anaerobic curing system. Its core advantage is ultra-large gap filling capacity up to 0.25mm, ideal for worn threads and oversized clearance fasteners on heavy machinery. It prevents loosening permanently under vibration; disassembly requires heating above 150℃ plus hand tools. It integrates anti-loosening, fluid sealing and rust-proof functions.
Core Technical Parameters
– Appearance: Homogeneous red high-thixotropic viscous liquid
– Chemical Composition: Methacrylate anaerobic resin system
– Viscosity: 6000~9000 mPa·s, excellent anti-sagging performance
– Density: 1.12 g/cm³
– Max gap filling: 0.25 mm (maximum clearance tolerance in this series)
– Fixture time: ≤20 mins at 23℃ ambient temperature; fully cured within 24 hours
– Breakaway torque: 32 N·m; Removable torque: 31 N·m
– Continuous service temperature: -50℃ ~ 150℃
– Applicable thread size: M6 ~ M36 metal bolts
– Disassembly condition: Heat above 150℃ before wrench disassembly
– Packages: 50ml bottle, 250ml large industrial bottle
– Curing Mechanism: Anaerobic curing, keeps liquid permanently when exposed to air
Key Product Advantages
1. Super large gap filling capacity: Fills thread clearance up to 0.25mm perfectly, solves loosening and leakage caused by thread wear and oversized tolerance, the best choice for old equipment overhaul;
2. Ultra-high permanent locking strength: Resists severe vibration and impact of mining & construction vehicles for lifelong fastening, only for non-periodic maintenance heavy-duty fasteners;
3. High viscosity anti-dripping formula: No sagging on vertical/overhead threads, clean operation inside narrow equipment cavities;
4. Superior chemical & corrosion resistance: Stable against engine oil, diesel, hydraulic fluid, coolant and acid/alkali solvents, permanently avoids thread rust and fluid leakage;
5. Wide substrate compatibility: Cures firmly on cast iron, carbon steel, stainless steel, aluminum alloy and galvanized metals;
6. Optimized for equipment maintenance: Compensates machining tolerance and deformation gaps generated during long-term service.
Main Applications
1. Overhaul locking for worn large-clearance bolts on truck engines, axles and differentials;
2. Thread fastening for worn reducers and hydraulic components of excavators & mining machinery;
3. Thread sealing and rust prevention for base and flange joints of petrochemical, metallurgy and generator equipment;
4. Repair locking for stripped and worn threads during ship & heavy machinery maintenance;
5. Assembly sealing for large-tolerance lifelong non-maintenance threaded fasteners.）
Our experienced engineers and technical specialists are here to provide professional guidance, product selection, and application support tailored to your specific requirements.
