A fluid seal generally comprising a first fitting portion (50) and a second fitting portion (28), wherein at least one of the fitting portions can be deformed or deflected in a sealing relationship relative to the other fitting portion to form the fluid seal. A fitting includes a first fitting portion comprising a small projection (52) extending from a substantially planar surface. The fitting further includes a fitting portion comprising a substantially planar second surface (59). A fluid seal is created by forcing the small projection of the first fitting portion and substantially planar surface of the second fitting portion together. As they are forced together, the projection deforms to form the fluid seal. The fitting can be used to connect tubes, pipes, a valve, a manifold, and combinations thereof. The sealing method can also be used to protect the components of a pressure sensor from the corroding effects of process fluid vapors.