B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$275.63
B-Line Eaton series Type 3/3R junction boxes, 8" 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, 8" height, 6" length, 6" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door,

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Model: 866 RTSC NK
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$275.63
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Eaton B-Line series Type 3/3R junction boxes, 8" 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:
8 in
Product Length Depth:
6 in
Product Weight:
4.8 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 866 RTSC NK – Frequently Asked Questions

1) Can the B-Line 866 RTSC NK junction box be mounted outdoors?
Yes, for outdoor use where falling rain and dripping water are the concern. The 866 RTSC NK carries a NEMA 3R rating and includes a rain hood over the cover. NEMA 3R is not a washdown or hosedown rating, so if the box will see direct spray or be pressure washed, step up to a 4 or 4X enclosure instead.
2) What are the box dimensions on the B-Line 866 RTSC NK enclosure?
8 inches high, 6 inches wide and 6 inches deep, with 16 gauge carbon steel walls. It weighs 4.8 lb, so a single installer can hold it to the wall while starting the anchors.
3) Does this B-Line junction box come with knockouts for conduit?
No. The 866 RTSC NK is the no-knockout version, so every wall and the back are blank. You drill and punch your own openings where the run actually lands, which is the usual choice when conduit entry does not match a standard knockout pattern. If you want factory holes, order a knockout version rather than the NK.
4) How does the cover come off on the 866 RTSC NK, and can I get into it repeatedly for service?
It is a screw cover, flanged, with plated screws. You back the screws out to open it, so it suits pull boxes and splice points that get opened occasionally rather than daily. For frequent access a hinged, latched door enclosure is the better pick.
5) How does this enclosure attach to a wall or strut?
Surface mount, using embossed thru holes in the back of the box. Anchors or bolts are not supplied, so pick fasteners for your substrate (masonry anchors, sheet metal screws into backing, or strut nuts if you are landing it on Unistrut).
6) Is this junction box UL listed for a spec-driven institutional job?
The 866 RTSC NK is built to UL 50, the standard for enclosures for electrical equipment, and it is made in the US. That plus the NEMA 3R rating is usually what a submittal package needs for an exterior pull box.
7) What is the exact part number to order this 8 x 6 x 6 B-Line rain-tight screw cover box?
Order Eaton B-Line 866 RTSC NK. The 866 is the 8 x 6 x 6 size, RTSC is the rain-tight screw cover style, and NK means no knockouts.
8) Will the finish on this B-Line box match the other grey enclosures on my job?
It ships painted in ANSI 61 grey, the standard grey used across most industrial electrical enclosures, so it lines up visually with typical panel and disconnect finishes. The base metal is carbon steel, so scratches should be touched up to keep corrosion off in a wet outdoor location.
How fast can I get the B-LINE 866 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 866 RTSC NK come with a warranty?
Absolutely. The B-LINE 866 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 866 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 866 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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