Abstract: The present invention relates to an improved grommet for protecting wires and tubes that must be placed thru apertures in building panels or studs made of steel or the like. The grommet disclosed here includes a single piece, soft plastic body having any configuration, (e.g. polygonal, round, oval, semi-circle, or even polygonal with curved edges) which is flanged along its periphery. On one side of the outer surface of grommet body's wall are arranged one or more protruding, male nubs which securely hold, in the gap formed between the wall flange and said male nubs, the rims of the aperture in a metal stud.