1. Hydraulic nuts are widely used in the metallurgy of copper and aluminum metals, the paper industry, hydraulic locking on slitting machines, etc.;
2. Installation and removal of propellers, rudder bearings, etc.;
3. Removal of high pressure joint surfaces, such as train wheels, couplings, flywheels, and gears.

Hydraulic nuts are an advanced bolt assembly method, particularly suitable for fastening in narrow spaces and on heavy-load vibrating machinery. The working principle of a hydraulic nut is to use a hydraulic cylinder to directly apply external force to the bolt, causing the bolt to stretch within its elastic deformation range. After the bolt is stretched, the locking ring on the hydraulic nut is tightened, which locks the bolt in the stretched position.