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The MSA 1/4" NPT Foster Steel Plug is a threaded air supply connector designed for breathing air systems used in confined space entry and other respiratory protection applications. This steel plug provides a secure, leak-resistant connection point for supplied air respirators and breathing air hoses.
Constructed from durable steel with a 1/4-inch NPT (National Pipe Thread) connection, this Foster-style plug delivers reliable performance in demanding industrial environments. The threaded design ensures a tight seal when mated with compatible Foster quick-disconnect couplers, preventing air loss and maintaining consistent airflow to respiratory equipment.
Key Features
1/4" NPT Threading — Standard pipe thread size compatible with most industrial breathing air systems and quick-disconnect couplers.
Steel Construction — Durable metal body resists wear and impact on the jobsite.
Foster-Style Design — Industry-standard quick-disconnect configuration for breathing air applications.
Secure Connection — Threaded interface creates a leak-resistant seal for consistent air supply.
Used by safety professionals, industrial contractors, and confined space entry teams who require reliable breathing air connections. Common applications include supplied air respirator systems, airline respirators, confined space ventilation setups, and breathing air manifold assemblies in construction, manufacturing, and utility work environments.
