Hernon Nuts N’ Bolts  425 is a single component anaerobic thread locking material that develops medium to high strength. Nuts N’ Bolts 423 is thixotropic (becomes a liquid when stirred or shaken) and cures in the absence of air when confined between close fitting metal surfaces. Nuts N’ Bolts 425 can be used at temperatures from -65°F to 300°F, and conforms to the requirements of ASTM D5363 (AN0331) and MIL-S-46163A (Type II Grade O).