Thumb Screw to Hold Attachments Onto KitchenAid Stand Mixers Replaces KitchenAid Part Numbers WP9709194, 9709194, 4162142, 1262050, 240374, 4169829, AH991938, EA991938, AP6013782, AP3952642, PS11747009, PS991938 1/4-20 Thread Size Quality Replacement Part Manufactured by Univen Univen mixer attachment knob fits KitchenAid mixers. This thumbscrew holds the attachments onto KitchenAid stand mixers. Will replace the following KitchenAid part numbers WP9709194, 9709194, 4162142, 1262050, 240374, 4169829, AH991938, EA991938, AP6013782, AP3952642, PS11747009, PS991938. 1/4-20 thread size. Quality part manufactured by Univen.