The nut for securing the brake line on the Citroen 11CV and 15CV is a crucial component ensuring a safe and reliable connection between the brake line and other braking components. This nut is designed to withstand high pressure and vibrations, effectively allowing brake fluid to flow through the braking system. It is made from durable materials to resist corrosion and wear. With precision engineering, the nut offers a perfect fit for the original braking components, contributing to a stable and safe braking performance. It is essential for maintaining the original performance of the Citroen 11CV/15CV.