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Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)China (CN)
- Number Of Knockouts:
- 8
- Product Type:
- Electrical box extension
- Selling Unit Of Measure:
- each
- Standards:
- UL E2969
- Volume:
- 30.3 in³
- Department:
- Electrical
- Product Group:
- Electrical Enclosures
- Product Subgroup:
- Boxes
- Product Type2:
- Extension Rings
- Product Size:
- 4 Inches Length x 4 Inches Width x 2-1/8 Inches Depth
- Product Color:
- Silver
- Product Material:
- Steel
Steel City 53171 1 – Frequently Asked Questions
1) Will the Steel City 53171 extension ring fit a standard 4 inch square electrical box?
Yes. The 53171 is a 4 inch square extension ring measuring 4 x 4 x 2-1/8 inches, so it mounts on the face of a standard 4 inch square (1900) steel box using the box's existing mounting ears. Steel construction, silver finish.
2) I need to bring a recessed 4 inch square box out flush with new drywall or tile. Is an extension ring the right fix?
That is exactly the use. The 53171 adds 2-1/8 inches of depth to a 4 inch square box so the device and cover land flush with a thickened wall surface, and it gains you 30.3 cubic inches of fill at the same time. If you only need a shallow build-out, a plaster or mud ring is the lighter option; for a full 2-1/8 inch extension plus added volume, use the extension ring.
3) How many knockouts does the 53171 4 inch square extension ring have?
Eight knockouts around the ring, giving you additional raceway or cable entries on top of whatever the original box already had.
4) Is the 53171 extension ring steel or plastic, and can I use it where the run needs to stay grounded?
Steel throughout, so it maintains metallic continuity with a steel box and metal raceway rather than breaking it the way a nonmetallic ring would.
5) Is the Steel City 53171 sold individually or in a pack?
It is sold each, one ring per unit, under manufacturer part number 53171.
How fast can I get the Steel City 53171 1 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 Steel City 53171 1 come with a warranty?
Absolutely. The Steel City 53171 1 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 Steel City 53171 1?
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 Steel City 53171 1 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.