Abstract: This invention relates to a connector bushing (1) comprising a plug-in zone (2) and a cable connection zone (3), the plug-in zone (2) being formed as a bushing (4) with a base (5), two side walls (7a, 7b) bent from the base (5), and first and second roof halves (8a, 8b) which start from the side walls and have free ends (9a, 9b) which are bent over towards the interior of the bushing. The connector bushing (1) comprises a central base zone (20) following the plug-in zone (2), being formed in the shape of a box with a base part in extension of the base of the plug-in zone with side walls in extension of the side walls of the plug-in zone and with a roof zone which is formed by third and fourth roof halves (18, 19) which are formed by bending over the side walls of the central base zone.

Abstract: In a flat contact socket with two spring contact arms elastically touching at a distance from the free ends over part of their length, arranged on the socket body and bent back at the free ends, and with outer springs supported on the contact arms or the purposes of easy and secure insertion of the flat contact socket into the socket housing, the socket body is firmly surrounded by an outer spring body and the outer spring body is provided at the diameter wall sections with arm parts, extending over the flat sides of the contact arms and obliquely to the free ends and to one another. In addition, the free ends of the arm parts are bent back over part of their length over the free ends of the contact arms against one another and in the insertion direction and arranged to press against the free ends of the contact arms.

Abstract: In order to improve the stability of a flat contact spring for plugs of electrical plug and socket connections which comprise connections for electrical conductors and a recess the marginal faces of which support a retaining tongue fastened to the spring housing, the contact spring is formed from a sheet metal cut-out with a first section composed of a central strip and longitudinal marginal strips which can be folded back onto the latter. The longitudinal marginal strips comprises cut-outs which extend as far as their edges and which together form an undercut recess when the longitudinal marginal strips are folded back onto the central strip.