B-Line Eaton series Type 3/3R junction boxes, 12" height, 4" length, 12" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single doo

Yes, within the limits of a NEMA 3R rating. The 12124 RTSC NK screw cover box is rated Type 3R, so it protects against falling rain, sleet and external ice formation, and it includes a rain hood over the cover seam. It is not a washdown or hosedown box, so skip it where the enclosure will be sprayed directly or submerged. Carbon steel construction with a painted ANSI 61 grey finish handles typical outdoor surface-mount use on a wall or structure.

12 inches high by 12 inches wide with a 4 inch depth, which is where the 12124 designation comes from. That 4 inch depth is the number to check first: it decides whether your conduit bodies, terminal blocks or wire bend radius fit behind the screw cover. Shipping weight is 8.5 lb.

No. The NK in the model designation means no knockout, so the box ships with blank walls and you drill or punch your own conduit entries where the run needs them. Plan on a hole punch set for the trade sizes you are landing. Wall material is 16 gauge carbon steel, so a standard knockout punch handles it fine. If you want factory holes, order a knockout version instead.

Surface mounting, using embossed thru holes in the back of the enclosure. The holes are formed into the back panel so the fasteners pass through without breaking the box's rain protection at the sides or top. You supply the anchors or screws suited to the substrate, whether that is block, concrete, strut or stud.

A screw cover box is the right call for a pull or splice point you rarely open. The 12124 RTSC NK uses a flanged screw-on cover with plated screws, which gives a tight rain-shedding seal but means you handle a loose 12 x 12 inch cover and a set of screws every time you go in. If the box holds controls, breakers or anything needing frequent access, a hinged door enclosure is easier to live with. For a 4 inch deep wiring junction that gets closed and left, the screw cover is the cheaper and cleaner choice.

Think twice. The 12124 RTSC NK body is painted carbon steel, which holds up fine on a normal outdoor wall but will eventually rust at drilled entries and scratches in salt air or around corrosives. For those locations specify a stainless or non-metallic 4X enclosure instead. For ordinary rain and sleet exposure, this 3R painted steel box is the standard answer.

The manufacturer part number is 12124 RTSC NK. Read it as 12 inch height, 12 inch width, 4 inch depth, rain tight screw cover, no knockout. That is the single model on this product, so there is no finish or size option to specify with it.

The finish is painted ANSI 61 grey, the standard industrial enclosure color used across most B-Line and competing steel enclosure lines, so a wall of mixed boxes will read as one family. Body and cover are carbon steel, and the cover screws are plated to resist corrosion where the box sits outdoors.