Mechanical Expansion Plugs

COB Industries manufactures and distributes mechanical expansion plugs and test plugs for just about any application so let us help you determine the right plug for your application. All we basically need to know the answers to a few questions in order to determine what type of plug would be the best option…what size?, what does the plug need to hold back, how much backpressure?, and how long is the plug going to be in place? Other issues (chemicals / temperature, etc.) may have to be considered as well.
Here is a quick breakdown of the mechanical expansion plugs:

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Nylon Expansion Plugs

These superior, versatile, expandable plugs are used to accommodate a wide variety of industrial applications where an airtight seal is required.

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Cast Aluminum Expansion Plugs

These superior, versatile, mechanical cast aluminum expansion plugs are used to accommodate a wide variety of industrial applications where an airtight seal is required.

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Low Pressure Expansion Plugs

Low pressure expansion plugs available in a variety of styles including Turn-Tite, Snap-Tite, Hex- Nut and Thumb-Nut Plugs.

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Pipe Plug Kit

Kit includes Mechanical Nylon Expansion Plugs from 1/2” through 4” sizes (includes fittings and caps) in a hard carrying case with custom foam inserts.