Flange (noun)

1. A projecting flat rim or collar, especially one used to strengthen or support a structure or as a connection or to give stability.
2. A projecting rim, collar or ring for strength, support, or attachment.

Origin:

From old english, flange, from middle dutch, flange, from proto-germanic *flangō.

Examples:

1. The flange on the pipe was used to secure it to the wall.
2. The flange on the gear was an important part of the machinery's structure.
3. The flange on the wheels of a train helped to keep them on the tracks.
4. The flange on the bottom of the pot prevented it from tipping over on the stove.
5. The flange on the lid of the jar made it easier to open and close.