Pass & Seymour M118W Old Work ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$67.13
$19.01
Pass & Seymour M118W Old Work Metal Switch and Outlet Box, Steel

Pass & Seymour M118W Old Work Metal Switch and Outlet Box, Steel

(No reviews yet) Write a Review

Model: M-118W

In Stock (leaves warehouse same day if ordered before 3pm ET)

$67.13
$19.01
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Pass & Seymour M118W Old Work Metal Switch and Outlet Box, Steel

The Pass & Seymour M118W is an old work metal switch and outlet box built in durable steel, designed for fast retrofit installations in existing wall surfaces. Featuring a large 18 cubic inch box volume and swing bracket mounting, this box fits a standard 2 x 4 stud cavity and is cULus Listed for reliable, code-compliant performance in renovation electrical work.

Key Features

  • Box Volume: Large 18 cubic inch box volume provides ample room for devices and wiring connections.
  • Durable Construction: Steel body for long-term strength and reliable retrofit performance.
  • Swing Bracket Mounting: Mounts directly in existing wall surfaces without intrusive hardware.
  • Cable & Conduit Compatible: Handles conduit, armored cable, or romex for flexible wiring options.
  • Integral Cable Clamp: Romex cable entry with a built-in cable clamp for secure, code-compliant terminations.
  • Standard Fit: Fits in a standard 2 x 4 stud cavity for straightforward retrofit installs.
  • Concentric Knock-outs: 4 concentric knock-outs sized 1/2'' or 3/4'' for flexible conduit entry.
  • Simple Installation: Requires only a simple rectangular cut-out for quick old work mounting.

Certifications & Compliance

  • cULus Listed

Technical Specifications

  • Country Of Origin: China
  • Product Color: Grey
  • Product Line: Pass & Seymour
  • Product Material: Steel

Typical Applications

  • Old Work / Retrofit Electrical Installations
  • Switch and Outlet Mounting in Existing Walls
  • Renovation and Remodeling Projects
  • Romex, Armored Cable, and Conduit Wiring
  • Standard 2 x 4 Stud Cavity Installations

Why Pass & Seymour?

Pass & Seymour builds the M118W with a durable steel body and a cULus Listing that electricians can trust for code-compliant retrofit work. The swing bracket design and integral cable clamp simplify old work installations without sacrificing the reliable, professional-grade performance expected from Pass & Seymour electrical products.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Outlet Box
Product Material:
Steel
Product Color:
Grey
Listing:
cULus
Department:
Electrical
Product Group:
Boxes & Enclosures
Product Subgroup:
Electrical Boxes
Product Width:
2.25 in
Product Depth:
3 in
Product Length:
3.25 in

Pass & Seymour M-118W – Frequently Asked Questions

1) Can the Pass & Seymour M118W be installed in a finished wall without opening up the drywall?
That's exactly what it's built for. The M118W is an old work box, so it mounts into an existing wall surface with swing brackets that clamp against the back of the drywall or plaster. All you cut is a simple rectangular opening. No stud attachment, no tearing out wall, which is why it shows up on remodel and retrofit work rather than new construction rough-in.
2) Will the M118W fit in a standard 2x4 stud wall?
Yes. The M118W is sized for a standard 2 x 4 stud cavity, so a conventional 3-1/2 inch deep framed wall with 1/2 inch drywall takes it without issue. In a 2x3 partition or a furred-out wall with shallow cavity depth you'd want a shallower box instead.
3) Can I run Romex into this box, or do I need conduit?
Either works. The M118W accepts conduit, armored cable, or Romex. It has an integral cable clamp at the Romex entry, so NM cable is secured at the box without adding a separate connector. For conduit or AC, use the four concentric knockouts, which step between 1/2 inch and 3/4 inch trade sizes.
4) Why choose a metal old work box instead of a plastic one?
Steel is the call when you're landing metal conduit or armored cable, because the box itself is part of the equipment grounding path, and when the job spec or a commercial occupancy requires metallic boxes. The M118W is a steel body in grey. Plastic old work boxes are limited to nonmetallic cable and can't serve as a ground path, so they're the cheaper residential-only choice.
5) Does anything come with the M118W box, or do I need to buy mounting hardware separately?
The swing brackets and the cable clamp are part of the box itself, so there's no separate mounting kit to order. What you still need on the job is the device, the wall plate, and any conduit connectors if you're using the 1/2 or 3/4 inch knockouts rather than the clamped Romex entry.
6) What part number do I order for the Pass & Seymour old work steel box?
Order it as Pass & Seymour M118W, manufacturer part number M-118W. It's a single configuration item, one box per part number, with no finish or size options to specify.
How fast can I get the Pass & Seymour M-118W delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pass & Seymour M-118W come with a warranty?
Absolutely. The Pass & Seymour M-118W is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pass & Seymour M-118W?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Pass & Seymour M-118W from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!