Radiator Cap For Case International Tractor A B H Others -43983D 100% new radiator cap meets OEM quality for tractors and farm equipment 1-year warranty covers you throughout planting and harvesting seasons Factory direct pricing delivers an honest value for hard-earned money Replaces OEM Numbers: Case/International Harvester: 43983DOliver: 1B507 Specs: Description : Radiator Cap, Inside Diameter : 1 13/16"