Abstract: A hinge mechanism is disclosed which allows for pivotal attachment of a moveable member to a fixed frame member defining a linear edge of an opening. Such pivotal attachment allows for movement of the moveable member relative to the fixed frame member between a closed position, in which the moveable member is positioned substantially within the opening, and an open position, about a pivot axis aligned parallel and adjacent to the linear edge and positioned in offstanding spaced relation thereto. The hinge mechanism comprises a fixed hinge component and a moveable hinge component. The fixed hinge component comprises a base portion, mountable upon the fixed frame member, a longitudinally extending pin portion and a support arm extending between the portions in connecting relation. The pin portion has a substantially cylindrical outer surface and is terminally positioned on the support arm, a portion of the outer surface defining a first bearing surface.