Used to lock and seal large coarse threaded nuts, bolts and studs in a wide variety of applications, high locking strength required.LOCTITE Letter Grade AVV High Strength Threadlocker is used to lock and seal large coarse threaded nuts, bolts and studs in a wide variety of applications where high locking strength is required. Note:This is a regional approval.Please contact your local Technical Service Center for more information and clarification.