Permatex red gel formula threadlocker provides �liquid-reliability� without drips, globs, mess or waste. The gel twist pin-point applicator puts the threadlocker right where you want it...on the part! A high strength threadlocker for heavy-duty applications 3/8" to 1" in size. Especially well-suited for permanently locking studs and nut/bolt assemblies. Replaces set screws and snap rings. Locks against vibration loosening. May require heat or special tools for removal. Conforms to AS D5363 AN0221 (Mil-S-46163A, Type I, Grade K).