A new old stock ABU screw. Part # 286. As fitted to the Cardinal, Abumatic and Ambassadeur 40, 41, 60, 70, 120, 136, 140, 141, 150, 152, 155, 160, 170, 503, 505, 4000, 4000D, 5000, 5000A 5000B 5000C, 5000D, 5001C, 5500, 5500C, 6000, 6000C & 6500C models. Alternative part numbers 286 and 975034.