HARDEX STUD & BOLT LOCK 6271 10ML DESCRIPTION Thread lock 6271 anaerobic thread locker is a green colored-coded medium to high strength and medium viscosity for general purpose fasteners. Excellent chemical and fuel resistance. It helps to prevent the loosening of bolts, screws, and studs up to 1” diameter from vibration. Heat may be required to disassemble the part. Ideal application for valve seats, fasteners on vibrating machines, automotive suspension bolts, refrigeration parts, transmission, and engine block studs. -Thread locking -High Strength -Medium Viscosity