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

Yes. The 664 RTHC carries a NEMA 3R rating, so it is built for outdoor use against falling rain and sleet, and it includes a rain hood over the cover. It is UL 50 listed. Note that 3R is rain-tight, not dust-tight or washdown rated, so keep it off of hose-down or heavy dust locations.

It measures 6 inches high, 6 inches wide and 4 inches deep. That 4 inch depth is what usually decides the job: it gives room for a small terminal block, a contactor, or a wire splice with a bit of bend radius, but it is tight for anything with a deep body. Shipping weight is 2.7 lb.

It is a surface mount box with embossed thru holes in the back panel area, so it fastens flat to a wall, post or strut with your own screws or bolts. Mounting hardware is not part of the enclosure, so pick fasteners to suit the substrate. It is not designed to be recessed into a wall.

For an outdoor wall, a pole, a rooftop curb or an unheated exterior area, 3R is the right and usual choice and the 664 RTHC covers it with its rain hood. If your location involves hose-down cleaning, windblown dust, or oil and coolant, 3R will not do it and you want a 4 or 4X gasketed enclosure instead. Indoors in a clean dry room, 3R is more box than you need and a Type 1 would be cheaper to install.

Three knockouts are provided in the 664 RTHC. If you need conduit entries elsewhere, plan on punching the carbon steel body yourself. Standard practice on a 3R enclosure is to keep added entries on the bottom or lower sides so water does not track in.

The cover is hinged on a formed top hinge and it is removable, so you can swing it open for service or take it off entirely during rough-in and wire pulling. There is a padlock provision on the cover for securing it in a public or shared area.

Body and cover are 16 gauge carbon steel with a painted finish in ANSI 61 grey. 16 gauge is a rigid wall that will not oil-can when you tighten a conduit fitting. Because it is painted steel rather than stainless, keep the paint intact and touch up any field-drilled edges, especially in coastal or chemical environments where stainless would be the better call.

It is finished in ANSI 61 grey, the standard industrial enclosure grey used across most switchgear and control cabinet lines, so it will read as a match alongside typical panel and disconnect enclosures. For facilities standardizing a look across many openings, that is the color to spec.