B-Line Eaton series Type 3/3R junction boxes, 6" height, 4" length, 4" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door,

Yes. The 644 RTSC NK is a NEMA 3R enclosure, so it is built for outdoor use where falling rain, sleet and external ice formation are the concern. It carries a rain hood over the cover and plated screws to handle the exposure, and it is UL 50 listed. NEMA 3R is not a washdown or hosedown rating, so for direct spray or dust-tight service you want a 4 or 4X box instead.

The box measures 6 inches high, 4 inches wide and 4 inches deep. That is the classic 6x4x4 pull and junction box footprint, so it slots into a run where you need a small splice or pull point rather than a gutter or wireway. It weighs 2.4 lb, light enough to hang off a surface with no supplemental support in most cases.

No. The NK in the model designation means no knockouts, so the carbon steel body ships blank and you punch your own openings wherever the conduit lands. That is the version to buy when you want to control hole placement and maintain the 3R rating on the top surface. If you would rather have factory knockouts, order the knockout version of the same RTSC box instead.

Surface mount, using embossed thru holes in the back of the box. The embossed holes keep the mounting fasteners from breaking the weather seal, which is what lets a 3R box stay rated once it is hung. Mounting hardware is not part of the enclosure, so pick fasteners to suit your substrate.

It is a screw cover, flanged, held on with plated screws. You back the screws out to get in, which means it is meant for a splice or pull point you rarely open, not a box you access daily. If you need frequent entry, a hinged door enclosure is the better choice.

16 gauge carbon steel, painted ANSI 61 grey. ANSI 61 is the standard grey used across most industrial control and distribution equipment, so the box matches adjacent panels and gutters on a typical plant or site install. Painted carbon steel suits general outdoor and industrial exposure; for coastal or corrosive environments specify stainless instead.

It is UL 50 listed, which is the enclosure standard specifying inspectors look for on a junction box, and it is made in the US. That combination is usually what a government, healthcare or education procurement spec needs on the submittal.

Order it as Eaton B-Line 644 RTSC NK. The number reads straight off the size: 6 high by 4 by 4, RTSC for the rain tight screw cover style, NK for no knockouts. There is one configuration, so there is nothing further to specify on the order.