A contact member intended for establishing an electrical contact between a substrate having a first electrical circuit and a first device that has a second electrical circuit , the contact member comprising of the following: - a base extending substantially along a plane (P) and having a first surface intended to be fixed on to the substrate , and a second surface opposite the first surface along a normal direction (N) substantially perpendicular to the said plane (P), the second surface being intended to be located face to face with the first device , and - at least one tongue integrally attached to the base and intended to be in electrical contact with the second electrical circuit , the tongue being flexible between a rest position, in which a distal end of the tongue is located at a distance away from the base on the side of the second surface along the normal direction (N), and a flexed position intended to be occupied when the tongue is in contact with the first device and in which the distal end is closer to the base along the normal direction (N) than in the rest position, characterised in that : - the base is of a larger dimension (D) that is less than or equal to 1 mm, and - the second surface includes a gripping surface of generally square or rectangular shape having a short side and a long side , the gripping surface extending over at least 0.01 mm 2 , and the short side having a length (D1) greater than or equal to 0.1 mm, and - the base and the tongue are formed from a plate comprising a first layer substantially parallel to the plane (P) and composed of a metal alloy containing copper in a proportion of at least 50% by weight, the plate preferably including a second layer situated on the first layer on the side of the second surface , and a third layer situated on the first layer on the side of the first surface , the second layer and the third layer containing nickel or a nickel alloy, in a proportion of at least 50% by weight. - a base extending substantially along a plane (P) and having a first surface intended to be fixed on to the substrate , and a second surface opposite the first surface along a normal direction (N) substantially perpendicular to the said plane (P), the second surface being intended to be located face to face with the first device , and - at least one tongue integrally attached to the base and intended to be in electrical contact with the second electrical circuit , the tongue being flexible between a rest position, in which a distal end of the tongue is located at a distance away from the base on the side of the second surface along the normal direction (N), and a flexed position intended to be occupied when the tongue is in contact with the first device and in which the distal end is closer to the base along the normal direction (N) than in the rest position, - the base is of a larger dimension (D) that is less than or equal to 1 mm, and - the second surface includes a gripping surface of generally square or rectangular shape having a short side and a long side , the gripping surface extending over at least 0.01 mm 2 , and the short side having a length (D1) greater than or equal to 0.1 mm, and - the base and the tongue are formed from a plate comprising a first layer substantially parallel to the plane (P) and composed of a metal alloy containing copper in a proportion of at least 50% by weight, the plate preferably including a second layer situated on the first layer on the side of the second surface , and a third layer situated on the first layer on the side of the first surface , the second layer and the third layer containing nickel or a nickel alloy, in a proportion of at least 50% by weight. <EOS>