This replacement screw is designed specifically for La Pavoni espresso machines and ensures a stable and tight connection to the sight glass. The sight glass allows users to monitor the water level in the boiler during the brewing process, which is essential for achieving the correct extraction and avoiding damage to the machine by dry boiling. With a precise fit, this screw contributes to the machine's optimal functionality and helps maintain a smooth coffee experience. It is an important component in the ongoing maintenance of your La Pavoni machine, ensuring that you always have full insight into the water level without any hassle.