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1 3/8 Expansion Plugs

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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SupplierLocTypeMaterialFinishSizeDescriptionQty 
MidStatesMIExpansion Plugs1 3/8concave expansion plugs 100/unit1162
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LibertyILExpansion PlugsSteelPlain1 3/8 x .0831-3/8 odx.083 material expansion plug100
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LibertyILExpansion Plugs300 Stainless (A1,A2, 18-8,304,310 etc.)1 3/8expansion plug 18-8 3041,800
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