A hex plug, also known as a hexagonal plug, is a type of fastener commonly used in plumbing, mechanical, and industrial applications. It has a hexagonal (six-sided) head which can be tightened or loosened using a spanner or socket. The primary uses of a hex plug include:

Sealing Openings: Hex plugs are often used to seal the ends of pipes or fittings to prevent leakage of fluids or gases. This is common in plumbing systems and hydraulic applications.

Access Points: They can serve as removable access points in a system, allowing for inspection, cleaning, or maintenance. By removing the plug, one can access the interior of the pipe or fitting.

Pressure Testing: In pressure vessels and piping systems, hex plugs can be used to temporarily seal openings during pressure testing to ensure there are no leaks.

Fluid Control: In some systems, hex plugs are used to control the flow of fluids by opening or closing specific pathways.

Preventing Contamination: By sealing unused ports or connections, hex plugs help prevent contamination of the system's contents from external elements like dirt or moisture.

 
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