Adjustable height fastener

An adjustable height fastener system comprising:

• a fixed receiver connected to a fixed structure and having a first threaded portion and a first slidable portion;
• an extendible member having a first aperture, a first adjustment portion disposed at a first end of the aperture and configured for grasping with at least one of a hand and a tool to rotate the extendible member, a second threaded portion, and a second slidable portion, the second threaded portion selectably (1) attachable to the first threaded portion to fix the extendible member extending away from the fixed receiver a first distance along a first axis, and (2) alignable to the first slidable portion to permit movement of the extendible member further along the first axis;
• and
• at least one offset sleeve (1) insertable into the aperture of the extendible member, (2) configured to receive a component fastener to connect a removable structure to the fixed structure, and (3) having a first annular collar configured to compress against the first adjustment portion at the first end of the extendible member in an inserted position.

A removable aircraft lavatory system comprising:

• a modular aircraft lavatory configured for installation and removal from an aircraft passenger cabin having a plurality of floor-mounted seat rails;
• and
• a plurality of adjustable height fastener tools placed between the modular aircraft lavatory and the plurality of floor-mounted seat rails and configured to attach the modular aircraft lavatory to the plurality of floor-mounted seat rails,
• wherein each adjustable height fastener tool of the plurality of adjustable height fastener tools comprises:
• a fixed receiver having a first attachment face with a first threaded portion and a first slidable portion, the fixed receiver connectable to a floor-mounted seat rail of the plurality of floor-mounted seat rails;
• and
• an extendible member having a second attachment face with a second threaded portion and a second slidable portion, the second threaded portion connectable to the first threaded portion to attach the fixed receiver to the extendible member at different locations along a first axis extending away from a floor of the aircraft passenger cabin, the different locations including a first location selected to space the modular aircraft lavatory away from the floor-mounted seat rail, and having a boss disposed at an end of the extendible member and configured for grasping with at least one of a hand and a tool to rotate the extendible member to disconnect the second threaded portion from the first threaded portion and to move the extendible member to the different locations;
• and
• at least one offset sleeve (1) insertable into an aperture of the extendible member, (2) configured to receive a component fastener to connect the modular aircraft lavatory to at least one of the plurality of floor-mounted seat rails, and (3) having a first annular collar configured to compress against the boss at the end of the extendible member in an inserted position.