LOCTITE® 241 is a blue, medium strength, 1-part low viscosity liquid threadlocker that prevents threaded fasteners from loosening due to shock or vibration. Its medium strength makes it a good choice for use on fastener sizes up to M12, which require disassembly with standard hand tools at room temperature for easy service and maintenance. This 1-part anaerobic adhesive is suitable for use on all metals, including steel, brass and stainless steel.