The special screw is used with different types of equipment and the application of the screw can vary depending on the model of equipment

Briggs & Stratton 691848 Governor Link Spring

Briggs & Stratton 699598 Blower Housing

Kohler 12 853 148-S Carburetor Kit with Gaskets

Efco 50310309 Breather Valve Chuck Size_1/4" The special screw is usedKeep your outdoor equipment performing at its best with high quality Efco replacement parts. Designed for a wide range of tools including blowers, lawn mowers, chainsaws, hedge trimmers, edgers, water pumps, and more these parts provide the durability and precision you need to keep your machines running like new. Each Efco replacement component is engineered to meet demanding performance standards, ensuring a reliable fit and long lasting service