Red Dot S121E-RL 4 HOLE 1/2 BO...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$184.74
$183.14

Red Dot S121E-RL 4 HOLE 1/2 BOX EXTENSION

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Model: S121E-RL
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$184.74
$183.14
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4 HOLE 1/2 BOX EXTENSION

Manufacturer Resources

Product Specs

Cable Entry Position:
Threaded Hubs
Product Group:
Electrical Boxes
Product Type:
Electrical box extension
Product type2:
Electrical box extension
Selling Unit Of Measure:
each
Department:
Electrical
Product Subgroup:
Outlet Boxes
Product Size:
4.56 Inches x 2.86 Inches x 1-3/8 Inches
Product Color:
Silver
Product Material:
Aluminum Alloy

Red Dot S121E-RL – Frequently Asked Questions

1) What size conduit do the hubs on the Red Dot S121E-RL box extension take?
The S121E-RL has four threaded hubs sized for 1/2 inch conduit. That means rigid or IMC threaded into the hubs directly, no connectors needed on the hub side.
2) How much depth does the Red Dot S121E-RL add to an existing outlet box?
It adds 1-3/8 inches of depth. Overall the extension measures 4.56 x 2.86 x 1-3/8 inches, so the footprint matches a standard single-gang weatherproof box face and the extra depth gives you room for device wiring or extra conductors.
3) Can I use a box extension instead of replacing an undersized weatherproof box?
Yes, and that's the usual reason to buy one. If your existing box is cubic-inch tight or the device won't sit back far enough, the S121E-RL stacks onto the box face and adds 1-3/8 inches of volume plus four more 1/2 inch hubs for additional runs, which saves cutting conduit back and swapping the box entirely.
4) Is the Red Dot S121E-RL extension suitable for outdoor or damp locations?
It is cast aluminum alloy with threaded hubs, which is the construction used for outdoor and damp-location conduit work. Aluminum resists corrosion better than steel in exposed installs, and the threaded hubs give you a tight conduit joint rather than an open knockout.
5) Will the Red Dot S121E-RL match my existing aluminum weatherproof boxes and covers?
It's aluminum alloy in a silver finish, so it blends with the standard cast aluminum weatherproof boxes and covers already on most commercial and multi-family exteriors. No painted or powder finish to chip or mismatch.
6) Is the Red Dot S121E-RL sold individually or in a carton?
Sold each. Order the quantity you need, one extension per unit.
How fast can I get the Red Dot S121E-RL 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 Red Dot S121E-RL come with a warranty?
Absolutely. The Red Dot S121E-RL 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 Red Dot S121E-RL?
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 Red Dot S121E-RL 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.