274220 - Miller Loctite 242 Blue Threadlocker Medium Strength 0.20oz

Industrial Grade Threadlocking Compound for Equipment Maintenance

The Miller 274220 Compound is a genuine OEM supply of Loctite® Threadlocker 242, a medium-strength, general-purpose anaerobic adhesive. Designed specifically for the maintenance and repair of industrial machinery, this thixotropic methacrylate ester cures when confined in the absence of air between close-fitting metal surfaces. It is engineered to lock and seal threaded fasteners, preventing loosening due to shock and vibration—a critical function for the longevity of welding power sources, generators, and wire feeding mechanisms.

Loctite 242 is distinguished by its "blue" color, indicating its medium strength classification. This property allows for the disassembly of parts using standard hand tools, making it the ideal choice for components that require periodic servicing or adjustment. Unlike permanent red threadlockers that require heat for removal, this compound strikes a balance between secure holding power and serviceability. It is particularly effective on fasteners ranging from 1/4 inch to 3/4 inch (6 mm to 19 mm) in diameter.

Beyond its locking capabilities, the Miller 274220 compound acts as a thread sealant. By filling the microscopic gaps between mating threads, it prevents leakage of fluids and gases and protects the assembly from corrosion and galling. This is essential in harsh industrial environments where moisture and contaminants can seize fasteners over time. The 0.20 fl oz bottle is compact, making it a perfect addition to any technician's field service kit or a shop's maintenance drawer.

Technical specifications for Loctite 242 include a broad temperature service range typically from -65°F to 300°F, ensuring performance in varied shop conditions. It sets rapidly on active metals like steel and brass, with fixture times often under 20 minutes, allowing for quick return to service. For passive substrates like stainless steel or plated surfaces, a primer may be recommended to accelerate the cure speed. This product is a staple in MRO (Maintenance, Repair, and Operations) strategies for ensuring equipment reliability and safety.