Threaded insert having a small external diameter for screws having a trapezoidal thread

摘要: A sturdy threaded insert for screws having a trapezoidal thread. To keep the external diameter of this small (due to limited space often available), and ensure that female thread produces perfect seal (if is closed in construction), constructed as follows: The basic shape represents circumscribed quadrilateral, which rhombus if symmetrical parallelogram asymmetrical. superimposed quadrilateral profiles are connected one another by web minimum wall thickness about 30% useful profile depth screw thread, any case at least 0.3 mm. In addition, flank projections annular surfaces equal on workpiece side side.