A grommet adapted to be assembled with a sheet material around an aperture in the sheet material is described. The grommet comprises a first flange and a second flange adapted to be assembled together with the sheet material positioned between. The first flange comprises locking pins to extend through the sheet material around the aperture and the second flange comprises corresponding holes for receiving the locking pins. Each locking pin comprising a rim that bears against a corresponding surface of the second flange to hold the flanges together.
