Yuken India Ltd. Supplies Cartridge Kits with Socket Head Cap Screws. Yuken India Ltd. Is an ISO 9001: 2000 certified company. Cartridge Kits with Socket Head Cap Screws consists of the rotating assembly inside the pump. Cartridge Kits with Socket Head Cap Screws construction makes it easy to replace just the cartridge and does not require any special assembly skills or fixtures. This cartridge kit contains pressure plate, side plate, rotor, vanes, cam ring and seals held together with socket head cap screws. It is available in different models.