Arlington Industries FSR404 4x4 Box

For Power Or Low Voltage

2 gang FSR404 electrical box

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Arlington Industries FSR404 4x4 Box

    Additional Images
  • Arlington Industries FSR404 4 by 4 retrofit junction box in black icon
  • Arlington Industries FSR404 4 by 4 retrofit junction box in red icon
  • Arlington Industries FSR404 4 by 4 retrofit junction box installation icon
  • Arlington Industries FSR404 4 by 4 retrofit junction box, steel icon
  • Arlington Industries FSR404 4 by 4 retrofit junction box, red steel icon
  • Arlington Industries FSR404 4 by 4 retrofit steel junction box installation icon

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Low Price GuaranteeWhat's special about these retrofit junction boxes?

  • Allows you to install electrical or low voltage connections in any retrofit application for greater versatility
  • Equipped with 1/2" and 3/4" knockouts, so you can easily attach conduit of the same size
  • Spring clips on the  box hold it against drywall to ensure a secure fit
  • Available in steel or nonmetallic materials to meet building codes for low voltage and electrical installations
  • Click for More Features

Arlington Industries FSR404 4x4 boxes provide great versatility, and allow for use on both electrical and low voltage installations. This allows you to purchase just one box to do it all! The sturdy steel or nonmetallic boxes are available in 2 colors to suit your application, meet code, or match your décor.

  • Screw holes for 2-gang devices are available to ease installation of a dual-gang wall plate or device
  • Can be adjusted for use on walls greater than 1-1/4" deep using bracket
  • Available in red, black, or natural steel color for color coding or to match your décor


Ideal for installations of:


AI-FSR404 Plastic 4" 4" 2.5" 0.38 lb 1/2", 3/4" 4" W x 3 3/4" H
AI-FSR404S Steel 4" 4" 2.5" 1.31 lbs 1/2", 3/4"
AI-FSR404 4" H x 4" W Non-Metallic black, red 0.38 lb
AI-FSR404S 4" H x 4" W Steel red, steel 1.30 lbs

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This great combo box allows you install power and low voltage all in one for an existing construction situation.

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The purpose of the Arlington Electrical Box Extender is to allow you to pull out your electrical box so that it lays flush with the newly installed wall covering without having to remove or repositioning the existing box. Talk about a way to save yourself some valuable time and money.


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adjustable box mounting bracketsERICO® CADDY® Adjustable Box Mounting Brackets
From for 50 pk
Designed to precision-mount conduit and electrical boxes in non-standard installations, these adjustable telescopic brackets feature sliding rails, marked measurements and foldable end tabs for easy attachment to studs.

non-metallic wiring connector bushings, NM94Arlington Industries® Black Button™ Non-Metallic Wire Connectors
From / 25 per pack
Designed to protect the wires being fed into electrical boxes without the use of additional conduit, these wire connectors accommodate up to 2 cables, snap into place without tools, and remove with nothing more than a flat head screwdriver.
steel side-mount fixture box, FBS1423Steel ONE-BOX™ Fixture Box
Perfect for both residential and commercial use, this fixture box attaches onto the side of existing joists and beams to accommodate the installation of ceiling fans and hanging lights without the need for new structural supports.

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