Multi-functional tightening clamps for a fuel cell

A multifunctional single-piece tightening clamp for a fuel cell intended to ensure, via a tightening surface (29), the stack of component elements of the fuel cell, said stack having an end surface having both predetermined electrically conducting areas and predetermined electrically insulating areas,

• characterized in that the lower surface of the tightening clamp is covered with an electrically insulating material over the predetermined areas corresponding to the insulated areas of the end surface of the stack, and is made up of a conducting material on a conducting surface (28) of said tightening surface (29), the conducting surface (28) corresponding to the non-insulated areas of the end surface of the stack, and in that supply and discharge openings (23) are covered with a material tolerating the use of the reactive gases used and water, used during operation of the fuel cell.