Permatex High Strength Threadlocker Red. OEM specified. High strength threadlocker for heavy-duty applications 10 mm to 25 mm (3/8” to 1”). Especially well-suited for permanently locking studs and press fits. Adds 20,680 kPa (3,000 psi) holding power on slip and press fit assemblies. Replaces set screws and snap rings. Locks against vibration loosening. May require heat or special tools for removal. Conforms to ASTM D5363 AN0221 (Mil-S- 46163A, Type I, Grade K).