The fittings consist of just a few parts: the flanged connection piece, the threaded connection piece with sealing ring and the union nut. The flanged connection piece and threaded connection piece are screwed together with the thread using the union nut. When the flanged and threaded sockets are joined together, they are centred using machined geometry elements, which fixes the screw connection parts in the µm range (using a precisely defined geometry).

The union nut is designed with a hexagon or octagon on the outer contour, while the threaded connection piece is designed with a bicorner. This ensures precise clamping of the threaded parts during final assembly with open-end spanners.

The welding ends of the collar and threaded connection pieces are designed for the selected welding techniques (orbital, oxyfuel, etc.) depending on the user's requirements. Special connections are also possible at any time.