Thread Locker is not needed or recommended for use on the servo output horn screw. As with many plastics, thread locker can damage and weaken the output gear potentially causing a failure. No thread locker is necessary on the output horn screw. If you have any further questions, please contact our product support team for further assistance. You can call us at our toll free number at 877-504-0233 or email at firstname.lastname@example.org
Important: Do not use liquid thread lock with the DS821 servo!
Do not use any form of liquid thread lock to secure the servo arm screw to the output shaft of the DS821 servo. Chemicals in these liquids react with the polycarbonate gear set causing the plastic to become brittle, fracturing the final output gear.