Mf Ignition Switch For Massey Ferguson Tractor - 1874535M3 100% new ignition switch 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: Massey Ferguson: 1874535M3 Specs: Shaft size : 0.625"(5/8" or 15.88mm), 27 thread pitch, Notes : Six (6) spade connectors. Three (3) position: switch, start and heat.