Permatex High-Strength Threadlocker is a premium red threadlocker designed for heavy-duty applications where a secure, permanent hold is essential. Specified as OEM 271, this high-strength formula is i for locking studs and press fits, providing up to 3000 PSI of holding power on slip and press fit assemblies. It effectively replaces set screws and snap rings, locking fasteners against vibration loosening to ensure long-lasting reliability. Suitable for fasteners sized from 3/8" to 1" (9.5-25mm), it is for use on cylinder block and rocker arm studs, ring gear bolts, frame bolts, and shock absorber bolts. The threadlocker operates within a temperature range of -65°F to 300°F, making it versatile for various environments. Removal requires extra effort or special tools, emphasizing its strength and permanence. Model Number: 27100