All purpose medium strength threadlocker Ideal for all nut and bolt applications 1/4in. to 3/4in. (6mm to 20mm) Locks and seals while preventing parts from loosening due to vibration Protects threads from corrosion Removable with hand tools Loctite Threadlocker 242 is an all-purpose, medium strength, blue threadlocker. Ideal for all nut and bolt applications 14" to 34" (6 mm to 19 mm). Eliminates the need for stocking expensive lock nuts and lock washers. Locks and seals while preventing parts from loosening due to vibration. Protects threads from corrosion. Removable with hand tools for easy disassembly. Typical Applications: Valve cover bolts, water pump bolts, oil pan bolts, drive shaft bolts, rocker arm adjustment nuts, carburetor studs.