a metal peg having a plate-like body including insertion units with pressing portions, each of the insertion units being on a side of the plate-like body, the insertion units terminating in fitting portions which extend downwardly and that are insertable into a substrate, the metal peg further having a pair of opposing latching claws formed at a center portion of said plate-like body and spaced from the fitting portions that latch to a substrate, whereby the metal peg is mounted onto the substrate, and wherein each of said latching claws is formed from first, second and third plate members, and includes

a protruding portion that is formed from said second plate member and is provided to protrude from a side of an end of the latching claw and latches to the substrate when the latching claw is pushed through an opening in the substrate; and

a flexing portion that is formed from said first plate member and being extended upwardly and that is disposed at an end of the latching claw opposite from the protruding portion thereof, wherein the third plate has a bent portion extending transversely from the flexing portion,

the first, second, and third plate members being substantially orthogonally disposed with respect to each other such that the flexing portion flexes in a thickness direction of said second plate member when said protruding portion is being latched to the substrate, and

wherein the first, second, and third plate members are formed integrally from a single plate, and the protruding portion and the flexing portion are formed at the latching claw by bending the plate from which the first and the second plate members are formed at a substantially right angle.