B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$219.89
B-Line Eaton series Type 3/3R junction boxes, 6" height, 6" length, 6" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door,

B-Line Eaton series Type 3/3R junction boxes, 6" height, 6" length, 6" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door,

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Model: 666 RTSC NK
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$219.89
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Eaton B-Line series Type 3/3R junction boxes, 6" height, 6" length, 6" width, NEMA 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door, No knockout, Embossed thru holes, Carbon steel

Manufacturer Resources

Product Specs

Certifications:
UL 50
Closure Type:
Flanged cover
Country Of Origin:
United States
Cover Type:
Screw
Finish Color:
Painted
Mounting Hole Details:
Embossed thru holes
Mounting Method:
Surface
Nema Rating:
3R
Product Height:
6 in
Product Length Depth:
6 in
Product Weight:
4 lb
Product Width:
6 in
Special Features:
Rain hood, plated screws
Wall Thickness:
16 gauge
Department:
Electrical
Product Model:
RTSC NK enclosure
Product Color:
ANSI 61 Grey
Product Style:
Small single door
Product Material:
Carbon steel

B-LINE 666 RTSC NK – Frequently Asked Questions

1) Can the B-Line 666 RTSC NK junction box be mounted outdoors?
Yes. The Eaton B-Line 666 RTSC NK is a NEMA Type 3R enclosure, so it is built for outdoor use against falling rain, sleet and snow. It also has a rain hood over the cover to shed water away from the seam. What 3R does not cover is washdown, hose-directed water or dust-tight service, so for those conditions you need a 4 or 4X box instead.
2) Does the 666 RTSC NK junction box come with knockouts for conduit?
No knockouts. The NK in 666 RTSC NK means no knockout, so the box ships with blank walls and you drill or punch your own conduit openings wherever the run lands. If you want factory conduit openings, order a knockout version of the screw cover box rather than the NK.
3) How do you mount the 6x6x6 B-Line 3R box to a wall?
Surface mount, using the embossed thru holes in the back of the box. Embossed holes keep the mounting fasteners standing off the mounting surface so water does not track in behind the box, and they let you fasten without drilling new penetrations. Fasteners are not part of the box, so pick anchors to suit masonry, stud or strut.
4) How does the cover attach on the B-Line RTSC junction box, and can I get into it quickly?
It is a screw cover, flanged, with plated screws. That means removing every screw to open it, which is fine for a pull box or splice point you rarely touch. If an electrician needs frequent access for troubleshooting, a hinged or clamp-cover enclosure is the better call.
5) What material and gauge is the B-Line 666 RTSC junction box, and will it hold up outside?
Carbon steel at 16 gauge, painted ANSI 61 grey. That is the standard grey finish on most industrial gear, so it blends with panels and disconnects already on the wall. Painted carbon steel is suited to general outdoor and industrial exposure; in coastal, chemical or washdown areas, specify stainless or a 4X enclosure instead.
6) What part number do I order to match the other B-Line 3R boxes on my site?
The catalog number is 666 RTSC NK, Eaton B-Line series, a small single door style screw cover enclosure made in the US. Ordering that exact number gets you the same 6x6x6 painted grey, no-knockout, 3R box every time, which is what you want when you are standardizing junction boxes across a facility.
How fast can I get the B-LINE 666 RTSC 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 B-LINE 666 RTSC NK come with a warranty?
Absolutely. The B-LINE 666 RTSC 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 B-LINE 666 RTSC 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
Why buy the B-LINE 666 RTSC NK 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.
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