B-Line Eaton series Type 1 junction boxes, 18" height, 10" length, 18" width, 1, Screw cover, SC NK enclosure, Surface mounted, Medium single door, N

No. The 181810 SC NK is a NEMA Type 1 enclosure, which is indoor-only protection against incidental contact and falling dirt. It has no gasket rating for water, dust, oil, or corrosive spray. For an outdoor wall, a damp mechanical room, or anywhere subject to hose-down or weather, you need a Type 3R, 4, or 4X box instead.

No knockouts. The 181810 SC NK is the NK (no knockout) version, so every conduit entry has to be punched or hole-sawed in the field. That's the version electricians usually want when the raceway layout is not standard, but if you're looking for pre-punched entries you need a knockout version rather than this one. The 16 gauge carbon steel wall punches cleanly with a hydraulic or ratchet knockout set.

It is a surface mount enclosure with thru holes in the back pan, so you fasten it directly to the wall or a strut rack with your own anchors or bolts. Thru holes mean the fasteners pass through the inside of the box, so the anchors are sized to your substrate (concrete, block, stud, or Unistrut) and are bought separately. There is no flush or recessed trim arrangement.

It is a screw cover, not a hinged door. The cover lifts fully off, which is easier for pulling wire through a box at height but means you're handling loose hardware on a ladder. B-Line helps there: the cover has keyhole slots so it hangs on partially backed-out screws while you line it up, and the screws are plated. If you want a door you can swing open repeatedly for routine access, choose a hinged cover enclosure instead.

It measures 18 inches high, 18 inches wide, and 10 inches deep. The 10 inch depth is generous for a pull or junction box, so there's room for conduit bodies, splice blocks, or a small terminal strip behind the cover. Shipping weight is 22.8 lb, so it is a two-hand lift on a ladder.

Order it as Eaton B-Line 181810 SC NK. The number reads as the dimensions first (18 height, 18 width, 10 depth), then SC for screw cover and NK for no knockout. The adjacent models in the family change one of those elements, so confirm all three parts of the suffix when you're matching an existing box.

Painted finish in ANSI 61 grey, the standard gray used across most commercial electrical equipment, so it lines up visually with switchgear, panels, and control cabinets in the same room. Carbon steel body, so it should stay indoors and dry to protect the paint.