Rim around base of tooth.

Supports tongue, stabilizes lower denture.

Connection using bolts, sealing interface.

Supports denture stability and retention.

Part of denture against cheek.

A flange nut is a nut that has a wide flange at one end that acts as an integrated washer.

Device connecting shafts, transmitting torque.

Seals pipe end for safety.

In plumbing, a closet flange (also known as a toilet flange) is a pipe fitting (specifically, a type of flange) that both mounts a toilet to the floor and connects the closet bend to a drain pipe.

Seal for unused pipe openings.