Loctite 638 Green High Strength Retaining Compound | 250 mL Bottle for Cylindrical Fits
Loctite 638 is a high-strength, green retaining compound designed to secure and permanently lock cylindrical assemblies. This anaerobic adhesive cures in the absence of air between close-fitting metal parts, creating a powerful bond that prevents loosening from vibration and shock. Ideal for securing bearings, bushings, shafts, and gears, it fills microscopic gaps to provide 100% surface contact and superior load distribution.
Key features of this 250 mL bottle include its high temperature resistance (up to 150°C / 302°F after curing) and its ability to withstand harsh environments, including exposure to oils and fuels. The green color allows for easy visual inspection during application. It is specifically engineered for parts with diametral clearances up to 0.15 mm (0.006 inches), making it perfect for securing press-fits and preventing fretting corrosion.
Benefits include increased reliability of assembled components, reduced maintenance, and the elimination of the need for costly machining like knurling or keyways. Use Loctite 638 for demanding applications in automotive, aerospace, industrial machinery, and heavy equipment manufacturing. It ensures your cylindrical fits stay secured permanently, enhancing performance and safety. For optimal results, ensure parts are clean using a Loctite primer for passive surfaces. This 250 mL bottle provides ample volume for professional and industrial use.
