Permatex 24300 Surface Insensitive Threadlocker Blue, 0.34 oz. Medium to high strength threadlocker for general-purpose applications Prevents loosening due to vibration Removable with hand tools for easy disassembly Especially well-suited for 6mm to 20mm (1/4" to 3/4") fasteners that have a slight oil film Suggested Applications: Rocker studs, rocker adjustment bolts and bolts on valve and cam covers, oil pans, disc brake calipers, intakes, alternators, and pulley assemblies