The Vita-Mix 836 Retaining Nut secures designated components within compatible commercial blending equipment to maintain proper assembly and operational stability. This replacement fastening component is designed to hold connected parts firmly in position, preventing unwanted loosening or movement during regular blender operation. It works by engaging with a corresponding threaded sec... https://partsfe.com/retaining-nut-for-vitamix-part-836/1-836.html