Poppet Quick Couplings - ISO7241-1A CHARACTERISTICS KSA Series offer Plastic / Aluminum caps and plugs for male/female. It is ideal for hydraulic applications where frequent connection and disconnection are required. Working components change can be accomplished in seconds increasing production and maintenance efficiency. APPLICATION Versatile KSA series couplings are used in a wide range of hydraulic applications including construction equipment, manufacturing machinery, and in-plant systems. They can be found anyplace where the fluid transfer lines need to be connected and disconnected for operation or maintenance of equipment.