Loctite 242 – Threadlocker

Loctite 242 is a medium-strength, blue anaerobic threadlocker designed to lock and seal threaded metal fasteners, preventing loosening caused by vibration, shock, and thermal cycling. It cures in the absence of air when confined between close-fitting metal threads, forming a durable bond that enhances the reliability of bolted assemblies while protecting against corrosion and fluid leakage.

Loctite 242 is ideal for fasteners that require secure locking but may need to be disassembled during routine maintenance. It is commonly used on steel, stainless steel, and other metal fasteners in automotive, industrial, electrical, and manufacturing applications. Once cured, it provides dependable holding power while allowing removal with standard hand tools, making maintenance quick and convenient.

The threadlocker offers excellent resistance to oils, fuels, hydraulic fluids, coolants, and many industrial chemicals. It helps eliminate the need for mechanical locking devices such as lock washers, reducing assembly time and improving long-term equipment reliability.

Key Features

• Medium-strength blue anaerobic threadlocker
• Prevents fastener loosening caused by vibration and shock
• Seals threads against moisture, corrosion, and fluid leakage
• Suitable for steel, stainless steel, and most metal fasteners
• Removable with standard hand tools
• Resistant to oils, fuels, coolants, hydraulic fluids, and industrial chemicals
• Reduces maintenance and improves equipment reliability
• Easy to apply with clean, consistent performance

Typical Applications

• Pumps and compressors
• Electric motors and gearboxes
• Automotive engines and transmissions
• Hydraulic and pneumatic equipment
• Industrial machinery and manufacturing equipment
• Fasteners on conveyors, machine tools, and production equipment
• General maintenance and repair

Benefits

• Prevents vibration-induced fastener loosening
• Protects threaded assemblies from corrosion and leaks
• Simplifies maintenance and servicing
• Reduces equipment downtime and maintenance costs
• Extends the service life of mechanical assemblies

Loctite 242 is a trusted threadlocking solution for manufacturers, maintenance professionals, and engineers who require reliable medium-strength fastening with easy disassembly, ensuring long-lasting performance and dependable protection in industrial and automotive applications.