It is sometimes necessary to seal off the end of a fluid pipe during repairs. Keep a collection of bungs or corks. Old pencil stubs are useful for corking the ends of narrow pipes.
Various proprietary hardening or non-hardening sealants are available for sealing joints - such as gasket compounds and thread-locking liquid for securing nuts and bolts.
A bung, stopper or cork is a truncated cylindrical or conical closure to seal a container, such as a bottle, tube or barrel. Unlike a lid, which encloses a container from the outside without displacing the inner volume, a bung is partially inserted inside the container to act as a seal.
A glass stopper is often called a "ground glass joint" (or "joint taper"), a rubber stopper is sometimes called a "rubber bung", and a cork stopper is called simply a "cork". Bung stoppers used for wine bottles are referred to as "corks", even when made from another material.
A common every-day example of a bung is the cork of a wine bottle. Bungs are used to seal the bunghole of barrels. Other bungs, particularly those used in chemical barrels, may be made of metal and be screwed into place via threading.
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