# Record card

The working principle of VTTJ is extremely simple. Two parts (at least one with tube shape) are screwed one into the other with a mechanical interference that creates a metallic seal. One part presents a cylindrical slot, the other presents a conical ring, whose diameter is slightly larger than the one of the cylindrical slot. When the two parts are screwed together, a plastic deformation occurs in the mechanical interference region.

Thematic areas
Aerospace and Earth Science
Energy and environmental sustainability
Energy and environmental sustainability / Nuclear fission/nuclear fusion
Additive and advanced industrial manufacturing
Additive and advanced industrial manufacturing / Vacuum/High vacuum technologies