Enerpac hydraulics [india] pvt. Ltd. Supplies single-acting lock nut cylinders, cll-series. Enerpac hydraulics [india] pvt. Ltd. Produces high-force tools, equipment and accessories applicable in industrial markets. The single-acting lock nut cylinders are designed with a safety lock nut to hold mechanical load. It has an overflow port which acts as a stroke limiter. These single-acting lock nut cylinders come with the following specifications: