MTL10 & HTL10 FASLOK™ THREAD LOCKERS are single component anaerobic thread lockers. These advanced chemistry thread lockers resist vibrational loosening, and effectively lock set screws, refrigeration fittings mounting bolts, equipment studs, lug nuts valve seats, etc. MTL10 is a medium strength thread locker with 100 lbs. breakaway torque. HTL10 is a high strength version.