Automotive Specialty Vacuum Fitting
A manufacturer of plastic automotive engine components was experiencing problems during the installation of a specialty vacuum fitting. The area around the mounting hole through which an M5 bolt passes was cracking when the torque load exceeded the specification. Controlling the torque within the required limits was difficult. It was also difficult to ensure the quality of the final product because the cracking did not always occur immediately upon installation. They needed a more robust design; one that was able to withstand more torque without fear of failure. A complete redesign of the part was not possible due to model year time constraints.