This Masterbuilt M4 Serrated Flange Nut Black is used as hardware in the following Masterbuilt Models, CS40G1DW, MB20060321, MB20061321
These M4 Serrated Flange Nuts are referred to as hardware letter “E” in the manual for Masterbuilt, Digital Charcoal Smoker Models, CS40G1DW, MB20060321, and MB20061321. They are used to secure the side handles to the main body of this smoker in place.