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Steel City 53151 1/2 3/4 Pre-Galvanized Steel Square Box Extension Ring with 1/2-Inch and 3/4-Inch Knockouts

4.5 4.5 out of 5 stars 88 ratings
$9.09
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Purchase options and add-ons

Material Alloy Steel
Brand Thomas & Betts
Color Silver
Style Compact
Finish Type Steel

About this item

  • Drawn construction
  • Used when you need to add extra wire capacity
  • Mounts directly on top of the square box
  • Allows you to add circuits
  • UL listed
› See more product details

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Steel City 53151 1/2 3/4 Pre-Galvanized Steel Square Box Extension Ring with 1/2-Inch and 3/4-Inch Knockouts
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Steel City 53151 1/2 3/4 Pre-Galvanized Steel Square Box Extension Ring with 1/2-Inch and 3/4-Inch Knockouts

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Product Description

From the Manufacturer

The Steel City 53151 1/2 3/4 is a pre-galvanized steel square box extension ring that has a 4-Inch diameter and is 1-1/2-Inch deep with a 21-Cubic Inch capacity. On each side and both ends of the ring there are two 1/2-Inch and one 3/4-Inch conduit knockouts. The extension is used when you need to add wire capacity and mounts directly on top of the square box so additional circuits can be ran. Steel City is the industries leading product line of metallic switch and outlet boxes used in electrical construction. Since 1904, its products have represented the highest quality standards in manufacturing and innovative design, with one of the most complete offerings available.

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Price$9.09$10.15$6.99$6.58$21.97-37% $9.17
List: $14.62
Delivery
Get it as soon as Monday, May 6
Get it as soon as Tuesday, May 7
Get it as soon as Monday, May 6
Get it May 13 - 14
Get it as soon as Tuesday, May 7
Get it May 7 - 8
Customer Ratings
4.54.5 out of 5 stars88
4.64.6 out of 5 stars36
4.64.6 out of 5 stars29
5.05.0 out of 5 stars2
4.44.4 out of 5 stars65
4.74.7 out of 5 stars165
Sold By
MistWorks
PandCSupply
Brand Name Lighting
bestbrandsupply
RUD Products
VoyageSupply
material
Alloy Steel
Plastic
Alloy Steel
—
Polymer
Alloy Steel
installation
Screw-In
Screw-In
—
—
Surface-Mounted
Wall Mounted
specification met
Ul
Ul
—
—
Ul
Ul Listed
style
Compact
Compact
2-Gang Toggle
Compact
Compact
Safety
weight
0.4 pounds
0.43 pounds
—
1.27 pounds
—
—

Customer reviews

4.5 out of 5 stars
4.5 out of 5
88 global ratings

Top reviews from the United States

Brenda
5.0 out of 5 stars Simple fix
Reviewed in the United States on October 7, 2023
Verified Purchase
Simple device
Helpful
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Katherine Murtha
5.0 out of 5 stars When you can't find one at a big box store
Reviewed in the United States on November 7, 2022
Verified Purchase
I needed an extension box for a 4" electrical junction box in my attic for access after foam insulation installation. I couldn't find one in stock at any of the big box stores so it was convenient to order this online. The quality is good and Steel City is a great brand. I have used their products previous when I lived near an electrical supply store.
Helpful
 Report
tgtech
4.0 out of 5 stars Solid extender, but very expensive
Reviewed in the United States on March 17, 2024
Verified Purchase
Works fine. Hard to find in a big box store as this is not a high demand item. Seems to be priced at twice what I would expect. Also be aware that using this rotates the cover plate mounting screw by 90 degrees.
Helpful
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Mike
5.0 out of 5 stars Good fit
Reviewed in the United States on December 2, 2021
Verified Purchase
Delivered as described. A little pricey.
Helpful
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ZRO
5.0 out of 5 stars Just what I needed
Reviewed in the United States on February 8, 2021
Verified PurchaseEarly Reviewer Rewards(What's this?)
Great product. Worked well to extend a box to meet box full requirements. Plenty of knockouts too.
Helpful
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ITsupportathome
5.0 out of 5 stars Works as designed
Reviewed in the United States on March 13, 2021
Verified PurchaseEarly Reviewer Rewards(What's this?)
Good quality. Did the job extending a junction box.
Helpful
 Report
John L.
5.0 out of 5 stars Good box extender.
Reviewed in the United States on January 16, 2021
Verified PurchaseEarly Reviewer Rewards(What's this?)
Not much to say, extended electrical box as described.
Helpful
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Gil
3.0 out of 5 stars Price and quality
Reviewed in the United States on February 16, 2023
Verified Purchase
Quality is good but the price is out of the ballpark
Helpful
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