An electrical connector including a first and second assembly that are matable with one another by a sliding push fit to establish electrical interconnection between the two assemblies is disclosed. The first assembly includes a contact pin with a collar extending concentrically around the pin to define a recess therebetween, with the collar supporting on its inner surface a first resilient contact element. The second assembly includes a sleeve open at one end thereof such that the sleeve can be received in the recess of the first assembly, with the sleeve supporting on its inner surface a second resilient contact element. The two assemblies may be arranged such that, when the second assembly is inserted into the first assembly, the first resilient contact element makes sliding electrical contact with an external surface of the sleeve of the second assembly, and the second resilient contact element makes sliding electrical contact with the external surface of the pin of the first assembly.