Abstract: A screw connection, in particular for machine construction, special machine construction and plant construction, comprises a first element with an external thread and a first head part, and comprises a second element with an internal thread and a second head part. When the first element is screwed fully into the second element, a surface between the first head part and the second head part is formed as a smooth circular cylinder which is suitable in particular for pinning. In this way, a particularly simple screw connection is created which simultaneously serves for pinning and which is versatile.

Abstract: A screw connection, in particular for machine construction, special machine construction and plant construction, comprises a first element with an external thread and a first head part, and comprises a second element with an internal thread and a second head part. When the first element is screwed fully into the second element, a surface between the first head part and the second head part is formed as a smooth circular cylinder which is suitable in particular for pinning. In this way, a particularly simple screw connection is created which simultaneously serves for pinning and which is versatile.

Abstract: A modular system for manufacturing structures for machine, special machine and plant construction comprises a plurality of components which are of elongate form and which each have at least two orifices, wherein two components can be connected to one another in a play-free manner by means of a connecting element (1000). This permits the construction of particularly solid and precise structures by which machine elements in machine construction, special machine construction and plant construction can be joined together.