Abstract: Provided are a wire conductor having high wire strength and high connection strength when the wire conductor is connected to a connector terminal even when the cross-sectional area of the conductor is smaller than 0.13 mm2, and an insulated wire provided with such a wire conductor. A wire conductor 1 has a cross-sectional area of less than 0.13 mm2, an electric resistance of not more than 660 m?/m, a tensile strength of at least 950 MPa, and a breaking elongation of at least 1.5%, and is to be used as a single wire.

Abstract: A wire conductor 10 includes a single core wire 11 made of stainless steel and a copper coating layer 12 made of copper or a copper alloy and covering an outer circumferential surface of the core wire. The wire conductor 10 has a cross-sectional area of less than 0.13 mm2 and a Young's modulus of less than 1.1×105 MPa, and is to be used as a single wire. Also, an insulated wire 1 includes the wire conductor 10 and an insulating sheath 20 covering the outer circumferential surface of one of the wire conductors.

Abstract: Provided is a surface treatment agent capable of imparting superior antifouling property as well as good and durable hydrophilicity to an inorganic substrate. The surface treatment agent is one comprising a pretreatment agent and a hydrophilizing treatment agent and being to be sequentially applied to an inorganic substrate, wherein the pretreatment agent comprises a silane compound having a reactive silyl group and an organic functional group and a polyfunctional monomer, and the polyfunctional monomer has one or more first reactive groups that react with the organic functional group and one or more second reactive groups that react with the hydrophilizing treatment agent.

Abstract: A wire harness has less differences of the amount of deflection caused by the self weight when the wire harness is constructed by arranging the plurality of the electric wire having the different cross-sectional area of the conductor. A wire harness has first and second electric wires arranged side by side in a direction intersecting an axial direction of the electric wires. Each of the first and second electric wires includes a conductor with a plurality of elemental wires, the second electric wire has a larger conductor cross-sectional area than the first electric wire has, the second electric wire has the larger outer diameter of the elemental wires composing the conductor than the first electric wire has, and the second electric wire contains a same or smaller number of elemental wires composing the conductor in comparison with the first electric wire.

Abstract: A wire harness has less differences of the amount of deflection caused by the self weight when the wire harness is constructed by arranging the plurality of the electric wire having the different cross-sectional area of the conductor. A wire harness has first and second electric wires arranged side by side in a direction intersecting an axial direction of the electric wires. Each of the first and second electric wires includes a conductor with a plurality of elemental wires, the second electric wire has a larger conductor cross-sectional area than the first electric wire has, the second electric wire has the larger outer diameter of the elemental wires composing the conductor than the first electric wire has, and the second electric wire contains a same or smaller number of elemental wires composing the conductor in comparison with the first electric wire.