Expansion Plugs, Aluminum

expansion plugs are mechanical sealing devices that are inserted into a hole and then expanded so they press tightly against the surrounding material, creating a secure, often leak‑tight and long‑term seal. They are commonly used to close or seal machined or cast holes in components, piping, or pressure‑containing parts by using a mechanical action (such as driving or tightening an internal element) that causes the plug body to expand radially and lock in place.

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