The steel bar sleeve is a special accessory for mechanical connection of steel bars and is suitable for ribbed steel bars with corresponding specifications. Before use, check that the sleeve and the reinforcement thread are free of damage and oil stain, and the effective length of the reinforcement thread head matches the sleeve. When connecting, screw the reinforcement into the sleeve until the thread head is fully engaged, and tighten it to the specified torque value with a torque wrench to ensure that the joint is not loose. High temperature and corrosion shall be avoided in the construction environment. Finished products shall be protected after installation. Knocking and collision are strictly prohibited. This product shall be operated by professionals and strictly follow the current construction specifications for steel bar connection.