A connector is provided which has a fluid passage whose volume does not substantially vary with the openingclosing of a valve disc. The guide face is formed by providing the edge of the rigid part with an integral thin part that is thinner than the rigid part and bending the thin part, or by partly removing the edge of the rigid part. The individual components of the metal frame, and assembly made from these components is adapted to provide for a substantially even planar surface without deformations, to which a cladding may be attached with a preferred even finish. It is to be appreciate that after the first and second reticles are complete, third and fourth reticles can pattern the first, second, third, etc.