A stopper structure for preventing a grommet made of elastic material from coming off from a panel, includes a stopper flange formed in the grommet. The stopper-structure further includes a stopper member made of rigid material, which includes an internal and an external circumferential ring fit in and on an internal and an external circumference of the stopper flange, respectively. The external circumferential ring is divided into two half elements which are connected with each other through a hinge. The internal circumferential ring is divided into two half elements which are connected to the half elements of the external circumferential ring, respectively.

This invention relates to electrical connectors, specifically to an electrical connector that is easy to insert into a hole or knock-out of an electrical junction box. Design of the connector provides for positive fixture of the connector in the box once non-metallic sheathed cable, either oval or circular in cross-directional shape, is inserted through the connector, thus preventing the cable from being withdrawn. The C-shaped one piece connector of this disclosure contains an integral hinge, a cutout area, and a necked down area on the top flange to provide for easy flexing about the central insertion axis and therefore easy insertion into an electrical junction box. The jaws of the electrical connector are designed such that a positive bite or grip is applied to an oval or circular non-metallic sheathed cable as tension is applied on said cable to attempt to remove it from said electrical enclosure.

A rotatable grommet for opening or closing access to a panel opening. The rotatable grommet is a C-shaped grommet having a grommet opening approximately the same size as the access area of a panel opening. The rotatable grommet includes a post that engages an arched slot formed in the panel. The ends of the arched slot define the open and closed positions for the rotatable grommet. The rotatable grommet includes a handle having handle protrusions that ease rotation of the rotatable grommet. At least one latch establishes friction between the rotatable grommet and the panel opening so that the rotatable grommet will not be inadvertently opened or closed.

A right angle strain relief grommet or cord holder which comprises a cylindrical grommet member having a circumferentially disposed flange provided intermediate the axial extremities thereof and resilient engaging projections disposed at a distance from said flange equaling the thickness of an apertured panel for accepting said cord holder therein and a lid member adapted to be integrally connected with said gromment member through the medium of a hinge piece and the lid further being provided on the free end side thereof with an outlet for leading out a cord. A cord desired to be passed through a panel, such as of an electric appliance, can be safely and securely held in position against said panel by inserting the grommet member of said cord holder into a complementary hole bored in the panel and allowing the panel to be grasped between the flange and the resilient engaging projections, passing said cord through the interior of the gromment member and the outlet of the lid member, bringing the lid member into engagement with the grommet member so as to bend the card and close the upper opening of said holding grommet member and coupling the grommet member and the lid member with the aid of suitable fastening means.