RoFLEX 5000 Series Hydraulic Couplings. These high-pressure screw couplings are ideal for very severe shear and breaker applications. They are connectable and disconnectable under pressure and offer a one-year warranty against leakage.Hydraulic couplings are used in demolition, construction, off-highway and other applications where tools, implements and other hydraulic attachments need to be connected or disconnected quickly, easily and safely without the time and expense of bleeding and refilling the hydraulic lines. The RoFLEX 5000 Series* robust construction will last for years in even the most severe applications. The screw thread connections eliminate Brinelling and the seals are readily accessible for easy replacement. The RoFLEX 5000 Series is supplied with caps and plugs to protect the thread and help prevent the ingress of contaminants.