The AllPoints Foodservice Parts & Supplies 1901491 Internal Tooth Lock Washer is designed specifically for use in frozen drink machines. With a 2-inch outer diameter and .375-inch teeth, this durable steel washer ensures a secure fit and reliable performance in your drink dispenser. Its internal tooth design provides enhanced grip, preventing loosening during operation. Ideal for maintaining the efficiency and longevity of your equipment, this lock washer is a crucial component for any frozen drink machine setup.