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LOCTITE 262 High Strength Threadlocker for Large Bolts Studs and Metal Fasteners
Loctite 262: High-Strength Threadlocker for Industrial and Heavy-Duty Applications
1. Product Overview
Loctite 262 is a high-strength, anaerobic threadlocker designed specifically for securing and sealing threaded fasteners in industrial and heavy-duty applications. This professional-grade adhesive is ideal for high-torque, heavy machinery, and equipment that operate under extreme conditions, ensuring long-term stability and preventing loosening due to vibration, thermal expansion, or shock. Loctite 262 provides reliable performance even in harsh environments, making it a trusted choice in automotive manufacturing, machinery assembly, and other demanding industries.
2. Key Features
- High-Strength Locking
- Provides exceptional holding power for high-torque threaded connections, ensuring permanent locking.
- Vibration Resistance
- Effectively prevents loosening due to vibration, making it ideal for use in machinery and equipment subjected to heavy loads and constant movement.
- High-Temperature Resistance
- Maintains strong bond integrity at temperatures up to 150°C (302°F), suitable for high-temperature applications.
- Chemical Resistance
- Offers excellent resistance to oils, lubricants, and a wide range of chemicals, ensuring durability in challenging environments.
- Professional-Grade Performance
- Formulated for industrial-grade applications, providing a secure and reliable seal for critical components.
3. Product Specifications
- Chemical Type: Methacrylate
- Color: Red
- Viscosity: 1,200 – 2,400 mPa·s (cP)
- Cure Time: Full cure in 24 hours at room temperature
- Maximum Thread Size: M36
- Operating Temperature Range: -55°C to +150°C (-67°F to +302°F)
- Shear Strength: 17 N/mm²
- Breakaway Torque: 22-30 Nm (M10 bolts)
- Prevail Torque: 7-20 Nm
- Chemical Resistance: Excellent against oils, lubricants, and various chemicals
4. Applications
- Heavy Machinery
- Ideal for securing bolts and fasteners in heavy-duty machinery and equipment, ensuring reliable performance under extreme loads.
- Industrial Equipment
- Provides secure locking for fasteners in industrial applications, particularly in environments with high vibration and temperature fluctuations.
- Automotive Manufacturing
- Widely used in automotive assembly for securing critical components, offering durability and resistance to harsh operational conditions.
- Machinery Assembly
- Ensures permanent locking of threaded fasteners in assembly processes, reducing maintenance needs and preventing equipment failures.
5. How to Use
- Clean the Threads: Ensure the threads are clean and free of oil, dirt, and debris for optimal adhesion.
- Apply the Threadlocker: Evenly apply Loctite 262 to the threads of the fastener.
- Assemble the Parts: Tighten the parts to ensure the threadlocker is evenly distributed.
- Curing: Allow 24 hours for full cure at room temperature. Higher temperatures can accelerate the curing process.
LOCTITE 262 Threadlocker for Permanent Fastener Locking
LOCTITE 262 Threadlocker is a one-component, high-strength anaerobic adhesive designed for permanently locking and sealing threaded metal fasteners. The red liquid cures when confined between close-fitting metal surfaces without air, creating a durable connection that helps prevent nuts, bolts, and studs from loosening or leaking under heavy shock and vibration. Its ready-to-use formulation requires no component mixing, making it suitable for industrial production, equipment assembly, and maintenance operations.
The medium-viscosity, thixotropic formula reduces unwanted migration after application, helping the material remain around the threaded engagement area instead of flowing onto nearby components. LOCTITE 262 Threadlocker is especially recommended for large bolts and studs up to M25 where a strong, permanent connection is required. It also fluoresces under ultraviolet light, allowing operators and quality-control teams to inspect adhesive coverage during production.
Key Benefits of LOCTITE 262 Threadlocker
LOCTITE 262 Threadlocker is based on dimethacrylate-ester technology and has a typical Brookfield viscosity of approximately 1,200–1,400 mPa·s at 25°C. Its specific gravity is approximately 1.1. This controlled-flow consistency provides effective thread wetting while reducing dripping and migration on vertical or partially assembled components.
Henkel lists a typical fixture time of approximately ten minutes on steel. Cure speed varies with the fastener material, thread clearance, temperature, and use of an activator. Active metals such as steel, brass, and copper generally promote faster curing, while passive surfaces such as stainless steel, zinc-plated parts, and certain coated metals may cure more slowly. Where curing is unacceptably slow or larger gaps are present, LOCTITE SF 7471 or LOCTITE SF 7649 activator can be applied before assembly.
After 24 hours at 22°C, published performance includes a typical breakaway torque of approximately 22 N·m and prevailing torque of about 32 N·m on M10 steel nuts and bolts. On pre-torqued M10 steel fasteners, representative breakloose torque is approximately 38 N·m. Compressive shear strength on steel pins and collars is at least 10 N/mm² after 24 hours under the specified test conditions. These values are typical laboratory results and should not be treated as guaranteed specifications for every fastener assembly.
Applications for LOCTITE 262 Threadlocker
LOCTITE 262 Threadlocker is suitable for large bolts, studs, nuts, threaded shafts, motor mounts, transmission components, pumps, gearboxes, presses, heavy machinery, construction equipment, and industrial maintenance assemblies. It can be used on steel, stainless steel, brass, and other compatible metal fasteners where high resistance to shock and vibration is required.
The cured material demonstrates resistance to motor oil, petrol, brake fluid, water-glycol mixtures, acetone, ethanol, and diesel-exhaust fluid under Henkel’s published laboratory ageing conditions. Actual durability depends on the fluid concentration, temperature, exposure period, joint geometry, fastener material, and mechanical load, so representative testing should be completed before production approval.
How to Apply LOCTITE 262 Threadlocker
Before applying LOCTITE 262 Threadlocker, clean the internal and external threads with a compatible LOCTITE cleaning solvent and allow them to dry. Shake the bottle thoroughly. For through holes, apply several drops to the bolt around the nut-engagement area. For blind holes, place the product on the lower third of the internal threads or into the bottom of the hole. Assemble and tighten the fastener immediately according to the required torque specification.
Because this is a high-strength grade intended for permanent locking, normal hand-tool removal may be difficult. Henkel recommends applying localized heat to approximately 250°C and disassembling the fastener while it remains hot. Cured residue can be removed by combining an appropriate LOCTITE solvent with mechanical abrasion such as wire brushing.
Storage and Safety of LOCTITE 262 Threadlocker
Store unopened LOCTITE 262 Threadlocker in a dry location between approximately 8°C and 21°C. Temperatures below 8°C or above 28°C may adversely affect product properties. Do not return dispensed material to the original container. The product is not recommended for pure oxygen, oxygen-rich systems, chlorine, strong oxidizers, or unverified thermoplastic applications.
For manufacturers requiring durable locking of large threaded fasteners, LOCTITE 262 Threadlocker provides high strength, vibration resistance, controlled application, UV inspection capability, and dependable anaerobic curing. Explore our high-strength threadlockers for bolts, studs, pumps, motors, gearboxes, transmissions, and heavy industrial machinery.
