Self-mating mechanical fastener with conductive contact element

A self-mating fastener, comprising:

• a backing having a first side;
• a rail element protruding perpendicularly from, and extending in a longitudinal direction along, the first side of the backing, the rail element comprising:
• a base portion attached to the first side of the backing and having a base width;
• and
• a cap portion having a cap width that is greater than the base width, wherein the cap portion overhangs the base portion on opposing sides;
• and
• an electrically conductive contact element extending perpendicularly from the first side of the backing and adjacent to the rail element, wherein the contact element is configured to provide resistive force in response to downward pressure from a distal end of the contact element toward the backing, and wherein the contact element comprises:
• a first base portion;
• and
• a second base portion,
• wherein the first base portion and the second base portion extend from the backing to form a vertex, and
• wherein the contact element extends in a longitudinal direction along the backing and has a height from the backing to the vertex that is at least as high as a height of the base portion and is no greater than two times the height of the base portion.