KitchenAid Stand Mixer Worm Pinion Gear Assembly, AP3177688, PS734273, 240309-2 5.95 Brand new KitchenAid stand mixer worm gear assemebly, 240309-2. For worm gear only use W10112253. Product Details Replaces part numbers: AP3177688, 4162100, 4162101, 4169907, 4169941, 4170007, 4176130, 949544, AH734273, EA734273, PS734273 Fits Models: 3K45, 3K5, 4K45, 4K5, 4KPD16, 4KSM150, 4KSM50, 4KSM90, 5K45, 5K5, 5KPM50, 5KSM150, 5KSM156, 5KSM45, 5KSM5, 7K45, 7K5, 8KSM90, 9KSM150, 9KSM90, BEA30, K45, K4, K5, KSM5, KSM90, KP5, KPM5, KSM100, KSM103, KSM111, KSM120, KSM150, KSM151, KSM155, KSM158, KSM160, KSM45, KSM5, KSM75, KSM90, KSM95, KSMC50