Home / Appliance / Parts / Downdraft Vent Screw, #8 x 1/2-in S99150488 Downdraft Vent Screw, #8 x 1/2-in S99150488$3.33 Price may not be up-to-date. In Stock View Product Part Number: S99150488 Brand: BROAN MFG CO. Seller: Sears PartsDirect Categories: Appliance, Parts Not Returnable Description This screw (part number S99150488) is for downdraft vents. 0Follow appropriate safety practices when installing screw S99150488.