Loctite 242 is designed for the locking and sealing of threaded fasteners which require normal disassembly with standard hand tools. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. Suitable for applications on less active substrates such as plated surfaces, where disassembly with hand tools is required for servicing. The thixotropic nature of Loctite 242 reduces the migration of liquid product after application to the substrate. - Loctite 242 medium strength Mil-spec blue threadlocker is a general purpose, removable threadlocker for fasteners between 1/4 Inch and 3/4 Inch (6 - 20 mm) diameters. Controlled lubricity for accurate clamp loads. Parts can be separated using hand tools.