Grommet for fiber optic enclosures

1. A grommet for use with a single-walled fiber optic enclosure having an opening adapted to receive the grommet so as to provide a substantially sealed passage for one or more fiber optic cables passing through the grommet and the opening, the grommet comprising:

a U-shaped central portion defining an inner face and a first portion of an outer face of the grommet, wherein the inner face and outer face are separated by a first thickness, the U-shaped central portion further including a thinned, penetrable region at or near a center area of the U-shaped central portion and forming part of the first portion of the outer face of the grommet, the thinned, penetrable region having a second thickness substantially smaller than the first thickness;

a pair of winged portions extending laterally from the U-shaped central portion, each winged portion defining an additional portion of the outer face and having an inner surface opposite the additional portion of the outer face and separated from the additional portion of the outer face by a third thickness that is substantially smaller than the first thickness;

a slot having inner and outer sidewalls extending around the entire outer periphery of a U-shaped wall formed by the U-shaped central portion, wherein the outer sidewall is planar with and forms a continuous surface with the inner surface of the winged portions; and

a retention feature unitary with and extending from the inner surface of each winged portion, each retention feature having a sidewall substantially perpendicular to the inner surface of the winged portion and each retention feature comprising a disc-shaped protrusion extending from the inner surface of the corresponding winged portion each for being received in a circular aperture in the single wall of the enclosure.

2. The grommet of claim 1 , wherein the thinned, penetrable region comprises a slit extending along the outer face of the grommet and extending at least partly through the thinned, penetrable region.

3. The grommet of claim 1 , wherein the thinned, penetrable region comprises one or more perforations extending at least partly through the thinned, penetrable region.

4. A fiber optic enclosure system comprising:

a single-walled housing comprising a plurality of outer walls defining a housing interior volume; and

a grommet, the grommet comprising:

a U-shaped central portion defining an inner face and a first portion of an outer face of the grommet, wherein the inner face and outer face are separated by a first thickness, the U-shaped central portion further including a thinned, penetrable region at or near a center area of the U-shaped central portion and forming part of the first portion of the outer face of the grommet, the thinned, penetrable region having a second thickness substantially smaller than the first thickness;

a pair of winged portions extending laterally from the U-shaped central portion, each winged portion defining an additional portion of the outer face and having an inner surface opposite the additional portion of the outer face and separated from the additional portion of the outer face by a third thickness that is substantially smaller than the first thickness;

a slot having inner and outer sidewalls extending around the outer periphery of a U-shaped wall formed by the U-shaped central portion, wherein the outer sidewall is planar with and forms a continuous surface with the inner surface of the winged portions; and

a retention feature unitary with and extending from the inner surface of each winged portion, each retention feature having a sidewall substantially perpendicular to the inner surface of the winged portion;

wherein a first outer wall of the housing comprises a substantially U-shaped opening dimensioned to receive the grommet so that the grommet fully occupies the U-shaped opening and so that an edge of the substantially U-shaped opening is positioned within the slot of the grommet, the first outer wall further comprising a pair of openings separate from the substantially U-shaped opening, extending through the first outer wall in the same direction as the substantially U-shaped opening extends through the first outer wall, and positioned and dimensioned to receive the retention features of the grommet when the grommet is positioned within and fully occupies the U-shaped opening, and wherein each retention feature comprises a disc-shaped protrusion extending from the inner surface of the corresponding winged portion, and wherein each one of the pair of openings on the at least one outer wall includes a circular aperture dimensioned to receive one of the disc-shaped protrusions.