High power contact socket

The invention relates to a flat sheet metal part for forming a cylindrically shaped contact cage with a receiving space for plugging in a contact in a plug-in direction Z, said sheet metal part comprising:a. a base shape with four edges and four corner sections, of which two of the edges extend parallel to one another and each form a collar crosspiece extending in each case between two corner section;b. a multitude of contact blades which connect the one collar crosspiece with the other collar crosspiece,c. wherein each collar crosspiece comprises a protrusion which lengthens the collar crosspiece in the region of one respective corner section, andd. wherein each collar crosspiece has a recess in the region of the respective other corner section.