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Arlington | Octagonal Mounting Boxes



NEW from Arlington

Steel Octagonal Fan and Fixture Joist Mounting Boxes

Secure Mounting • For Joist Mounting in New Construction


Arlington’s steel octagonal boxes offer the fastest and most secure way to mount a fan or fixture to a joist. FBS415 and FBS420 mount to the underside of a joist while the ‘S’ series boxes mount on the side. These boxes ship ready to use with no loose parts to misplace! The box and bracket installation screws ship captive. They also include multiple knockouts, an installed mud cover, and NM cable connector.


Part Numbers: FBS415S, FBS415, FBS420S, FBS420

Features and Benefits

• Combination Hex/Phillips head screws make for easy installation in new construction.
FBS415 14.6 cu in • 1-1/2" deep. FBS420 20.0 cu in • 2" deep.
• UL/CSA Listed

Instalation Shots

Installation Shots



Download the Specification Sheet
French Spec Sheet
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How to Buy

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Purchasing in Canada? Please click here to contact our Canadian Representatives.