Double locking device ?DSL“

　　The ?DSL“- double locking deviceis a locking element?

　　that, due to a design-related from of elasticity with?

　　respect to its height dimension, prevents the loosening?

　　of screw connections resulting from a yielding deformation of the screws or workpiece. Simultaneously, a?

　　high degree of sealed-tightness of the connection is?

　　also achieved.

　　The basis for the development of this product was the?

　　integration of the advantages of two materials and two?

　　strengths.

　　The function of the steel locking element enclosed by?

　　the tough, hard polyamide is to provide a steel-to-steel?

　　connection between the nut or bolt head and workpiece that is able to absorb the enormously high pretensioning forces when the parts are being screwed?

　　together.

　　Due to the bending, distorting and penetrating of the?

　　tooth-shaped projections into the surface of the involved surface areas, the friction is increased and results?

　　in a form-fit connection.

　　The plastic material enclosing the steel locking element adapts itself to these deformations flowingly and?

　　protects the locking element against corrosion for a?

　　long time.

　　The second locking element of this DSL-double locking

　　device is the enclosing plastic washer made of polyamide.

　　The effect of this design shape is based on the fact?

　　that the friction between the comparably hard surface?

　　of the nut or bolt head as well as of the workpiece and?

　　of the slightly deformable plastic piece is increased?

　　accordingly, and on the fact that the plastic material?

　　adapts itself to the unevenness of the supporting

　　surface of the nuts or bolt head and workpiece and on?

　　the fact that the plastic material is pressed outward?

　　and downward due to its initial shape in order to place?

　　itself there around the external surface of the nuts or?

　　bolt heads of hexagon head screws and hexagon socket screws and then penetrates into the threads.

　　Here an additional higher degree of friction locking is

　　produced which results in the double effect of this?

　　elastic, highly loadable locking device.

　　made of polyamide 6 + spring steel