Permatex Penetrating Grade Threadlocker Green is a low-viscosity threadlocking liquid designed for pre-assembled fasteners. It wicks into the threads, securing them in place without requiring disassembly. This makes it ideal for simplifying preventive maintenance. Suitable for fasteners ranging from #2 to 1/2" (2.2 to 12mm), it conforms to ASTM D5363 AN0261 (Mil-S-46163A, Type III, Grade R). Disassembly requires localized heating and hand tools.