Abstract: One aspect of the invention is directed to a filter assembly for use in a baghouse having a tubesheet with a plurality of thimbles each having a beaded portion. The filter assembly comprises a cylindrical filter bag having an axial end portion formed into a cuff. The cuff of the filter bag is adapted to be positioned within the thimble. The filter assembly also includes mounting structure adapted to be located within the cuff of the filter bag to mount the filter bag relative to a respective thimble of the tubesheet. The mounting structure comprises an annular gasket. The gasket includes a bead portion. The mounting structure also includes a resilient snapband for exerting a force to expand the gasket outward and seat the bead portion of the gasket within a beaded portion of the thimble to form a seal.