Category:Animated letter A Wikimedia Commons Koldo Alzola (Freedom For Juana): Health Work Commitees osasun Category:Animated letter A Wikimedia Commons A B1846431 AI KNOB AIR CLEANER COVE. One New Aftermarket Replacement Air Cleaner Cover Knob Fits Briggs & Fits Stratton Small Engines This aftermarket replacement air cleaner cover knob (also called a thumb screw) secures the air cleaner cover assembly on Fits Briggs & Fits Stratton small gasoline engines. Keeping the air cleaner cover firmly fastened prevents dirt and debris from bypassing the air filter and entering the engine, maintaining clean airflow and protecting internal engine components. This knob is a direct replacement Fits Briggs and Stratton OEM part number 846431. Compatible With Fits Briggs & Fits Stratton: This knob fits a wide range of Fits Briggs & Fits Stratton small engine models used in lawn mowers, riding tractors, and other outdoor power equipment. Part 846431 has been confirmed across thousands of engine configurations. Use your engine model number to verify fitment before ordering. Replaces Part Number(s): 846431, B1846431, A B1846431 AI New aftermarket replacement part not remanufactured, not used.