ISO 4395:2009

ISO 4395:2009 establishes a basic series for piston rod end types for application on cylinders used in hydraulic and pneumatic fluid power systems. ISO 4395:2009 specifies thread dimensions and configurations for use with hydraulic and pneumatic cylinder piston rod ends, as well as the dimensions of wrench flats and hook wrench holes that are sometimes necessary for the assembly of the cylinder piston rod's threaded end to accessories.