Milbank Screw Cover Junction B...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13.26
Milbank Screw Cover Junction Box, NEMA 1 Steel Enclosure

Milbank Screw Cover Junction Box, NEMA 1 Steel Enclosure

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Model: 444-SC1-NK

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

$13.26
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Milbank Screw Cover Junction Box, NEMA 1 Steel Enclosure

The Milbank Screw Cover Junction Box is a NEMA 1 enclosure line constructed of polyester powder coated steel, purpose-built for indoor general-purpose electrical wiring applications. This family is available in enclosure sizes ranging from 4-Inch x 4-Inch x 4-Inch up to 6-Inch x 6-Inch x 6-Inch, with configurations offered both with knockouts and without knockouts, allowing electricians to select the exact footprint and conduit-entry setup a given job requires. Finished in ANSI 61 Gray, every box in this line delivers a clean, corrosion-resistant surface that holds up to the daily demands of commercial, industrial, and light residential electrical panels.

Key Features

  • Trade Size Range: Available from 4-Inch x 4-Inch x 4-Inch through 6-Inch x 6-Inch x 6-Inch enclosure dimensions, providing a compact, versatile footprint for wiring junctions, splices, and pass-through connections.
  • Durable Construction: Polyester powder coated steel construction resists corrosion, scratching, and the wear associated with everyday electrical installation work.
  • Screw Cover Access: A removable, screw-secured cover provides straightforward access to internal wiring connections while keeping the enclosure fully closed during normal operation.
  • Knockout Options: Select models are supplied with knockouts for standard conduit entry, while other configurations ship without knockouts so electricians can field-drill conduit openings in the exact locations required by the job, avoiding unused holes.
  • NEMA 1 Rating: Rated for general-purpose indoor use, protecting enclosed wiring and connections from incidental contact and light dust accumulation.
  • Finish: ANSI 61 Gray polyester powder coat finish provides a durable, professional-grade appearance that matches standard industrial and commercial panel color schemes.

Certifications & Compliance

  • NEMA 1 Indoor General-Purpose Rated Enclosure

Technical Specifications

  • Configuration: NEMA 1 Enclosure
  • Available in 4-Inch x 4-Inch x 4-Inch (Without Knockouts), 6-Inch x 6-Inch x 6-Inch (With Knockouts), and 6-Inch x 6-Inch x 6-Inch (Without Knockouts) configurations.

Typical Applications

  • Indoor Electrical Wiring Junctions
  • Commercial and Industrial Panel Enclosures
  • General-Purpose Wire Splicing and Pass-Through Boxes
  • Renovation and New Construction Electrical Work
  • Field-Configured Conduit Routing Where Standard Knockouts Do Not Fit

Why Milbank?

Milbank builds this Screw Cover Junction Box line from polyester powder coated steel with a durable ANSI 61 Gray finish, giving electrical professionals a rugged, corrosion-resistant enclosure for indoor NEMA 1 wiring installations across a range of sizes and knockout configurations. The screw cover design gives installers straightforward access while maintaining consistent, code-compliant performance across commercial and industrial job sites. Choosing Milbank for junction box needs means specifying an enclosure family built to withstand daily use in demanding electrical environments, with the flexibility to match the exact size and knockout configuration each installation calls for.

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Manufacturer Resources

Product Specs

Product Type:
Junction Box
Product Finish:
Polyester Powder Coated
Configuration:
NEMA 1 Enclosure
Department:
Electrical
Product Subgroup:
Electrical Boxes
list_batch:
MIL-20260917
Product Material:
Steel
Product Color:
ANSI 61 Gray
Product Group:
Boxes & Enclosures
Product Size:
4" x 4" x 4" - 6" x 6" x 6"

Milbank 444-SC1-NK – Frequently Asked Questions

1) What is the difference between the Milbank 666-SC1 and 666-SC1-NK junction boxes?
Both are 6 in x 6 in x 6 in screw cover boxes. The 666-SC1 ships with knockouts for standard conduit entry; the 666-SC1-NK ships without knockouts so you field-drill the openings where the run actually lands. If your conduit entries do not line up with factory knockout locations, or you do not want unused holes in an indoor box, order the NK version.
2) What sizes does the Milbank screw cover junction box come in?
Three orderable configurations: 4 x 4 x 4 inches without knockouts (444-SC1-NK), 6 x 6 x 6 inches with knockouts (666-SC1), and 6 x 6 x 6 inches without knockouts (666-SC1-NK). Note the 4-inch box is offered only in the no-knockout version, so if you need factory conduit entries you are working with the 6-inch cube.
3) The Milbank junction box is NEMA 1 indoor only - what should I use for a wet or washdown location?
The Milbank screw cover junction box line is a NEMA 1 enclosure rated for general-purpose indoor use. For an outdoor, wet, or washdown location, the Rittal 80181 JB Series is a hinged-cover junction box rated IP66/NEMA 4X, which is intended for water and corrosive exposure. Note the Rittal uses a hinged cover rather than the removable screw-secured cover of the Milbank boxes.
4) Do I need a separate cover for the Milbank 666-SC1 junction box?
No separate cover purchase. It is a screw cover design, so the removable cover and its screws come as part of the enclosure. You unscrew it for access to splices and reinstall it to close the box.
5) Is a Milbank screw cover box the same thing as a 4-square device box?
Different animal. The Milbank screw cover box is a NEMA 1 enclosure for splices, pass-throughs, and wiring junctions, with a flat screw-on cover and sizes from 4 x 4 x 4 up to 6 x 6 x 6 inches. A 4-square steel box like the Orbit 4SDB Series square deep box or the Orbit D4SB Series 1-1/2 inch deep 4 inch square box is the stamped or welded device box you mount devices and plaster rings on. Use the screw cover enclosure where the box is a junction, not a device location.
6) Which Milbank box should I order if my conduit comes in at an odd spot?
Take a no-knockout version, either 444-SC1-NK at 4 x 4 x 4 inches or 666-SC1-NK at 6 x 6 x 6 inches. Both ship blank so you punch conduit entries exactly where the run lands, with no unused openings left in the enclosure. You will need your own hole punch or step bit and the appropriate connectors.
7) I need a small junction box with a 1/2 inch knockout already in it. Does Milbank offer that?
In the Milbank screw cover line, the 4 inch box is supplied without knockouts, so the factory-knockout option is the 6 x 6 x 6 inch 666-SC1. If you want a smaller box that already has a 1/2 inch knockout and a cover, the Cantex 5133690 is a 4-1/8 inch junction box with a 1/2 inch knockout and cover.
8) Is an Orbit 4-inch square box a substitute for the Milbank 444-SC1-NK?
They solve different problems. The Milbank 444-SC1-NK is a 4 in x 4 in x 4 in NEMA 1 screw cover enclosure supplied without knockouts so conduit openings can be field-drilled. The Orbit 4SDB Series is a welded steel square deep box with 1 inch knockouts, and the Orbit D4SB Series is a 1-1/2 inch deep 4 inch square drawn steel junction box sold in packs of 100. The Orbit boxes are standard square device boxes with fixed knockouts and shallower depth than the 4 inch cube of the Milbank, and the D4SB comes only as a 100-piece pack.
9) I only need a small box with a half-inch conduit entry and a cover - is there a simpler option than the Milbank?
Yes. The Cantex 5133690 is a 4-1/8 inch junction box with a 1/2 inch knockout and cover, which covers a single small conduit entry. The Milbank 444-SC1-NK is a 4 in x 4 in x 4 in steel NEMA 1 box shipped without knockouts, so it suits jobs where the conduit openings need to be drilled in specific field locations rather than taken as supplied.
10) Will the gray finish on this Milbank box match my existing panels and gutter?
The finish is ANSI 61 Gray polyester powder coat, the standard color used on commercial and industrial panelboards, troughs, and meter equipment. Boxes added to an existing ANSI 61 installation will read as the same gray, which is why facility and MRO buyers standardize on it.
11) For a 100-box buy on a multi-family rough-in, is the Milbank line the right choice?
The Milbank screw cover line is offered as individual NEMA 1 enclosures in 4 in x 4 in x 4 in and 6 in x 6 in x 6 in sizes, with or without knockouts, which suits selecting an exact footprint per opening. For high-count repetitive rough-in of shallow 4 inch square boxes, the Orbit D4SB Series is a 1-1/2 inch deep 4 inch square drawn steel junction box supplied in a pack of 100.
How fast can I get the Milbank 444-SC1-NK 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 Milbank 444-SC1-NK come with a warranty?
Absolutely. The Milbank 444-SC1-NK 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 Milbank 444-SC1-NK?
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
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