Permatex 24300 Surface Insensitive Threadlocker Blue is a medium/high-strength thread-locking compound formulated for general-purpose fastener retention. It is especially suited for fasteners ranging from 1/4 in. to 3/4 in. (6 mm to 20 mm) and performs reliably even when a slight oil film is present on the threads - a common condition on heavy-duty truck components. The formula resists vibration loosening and remains oil resistant once cured. Fasteners can still be removed with hand tools, making disassembly straightforward during service. Specified for OEM applications. Call us to confirm this is the right threadlocker for your application.

OEM specified. Medium/high strength threadlocker for general-purpose applications. Especially well-suited for 1/4″ to 3/4″ (6mm to 20mm) fasteners that have a slight oil film. Prevents vibration loosening. Oil resistant. Removable with hand tools for easy disassembly.