Loctite threadlockers loctite 1266117 loctite 276 has been designed for the permanent locking and sealing of threaded fasteners it cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage due to shock and vibration loctite 276 is particularly suited for fast cure thereby reducing the need for activators and is ideal for use on less active substrates such as coated or plated surfaces loctite 1266117 276 fast fixturing threadlocker 5