B-Line Eaton series Type 1 junction boxes, 6" height, 4" length, 6" width, 1, Screw cover, SCGV NK enclosure, Surface mounted, Small single door, No

No. The 664 SCGV NK carries a NEMA Type 1 rating, which is indoor use only, for protection against incidental contact and falling dirt. It gives no protection against rain, hose-down, dust or corrosive atmospheres. For a damp or outdoor location you need a NEMA 3R or 4 enclosure instead. The galvanized steel shell also arrives unfinished, so it is not intended for weather exposure.

It measures 6 inches high, 6 inches wide and 4 inches deep, which is where the 664 designation comes from. That 4 inch depth is what matters most when you are figuring conductor bending space and whether the box will sit acceptably proud of a finished wall. Shipping weight is 3.1 lb.

No knockouts. The NK in the model name means the box ships blank on all sides, so you punch or drill your conduit and connector openings exactly where the run needs them. Plan on a step bit or a knockout punch set on site. If you would rather not field-punch, order the knockout version of the screw cover box instead.

Yes, the 664 SCGV NK is built to UL 50, the standard covering enclosures for electrical equipment, and it is a NEMA Type 1 enclosure. That is the pairing a plans examiner or facility engineer looks for on an indoor pull or splice box. It is made in the US.

Surface mount, using thru holes in the back of the enclosure. You supply the anchors or screws suited to the substrate, whether that is toggle bolts in drywall, tapcons into masonry, or self-tappers into strut or steel. The cover also has keyhole slots, so you can back off the plated cover screws and lift the cover away without fully removing them.

A screw cover box like the 664 SCGV NK is the right call for a splice or pull point you rarely open, since the cover fastens down with plated screws and stays put. If the box houses controls, terminal blocks or anything you or a tech will open regularly for troubleshooting, a hinged cover enclosure saves time and avoids dropped screws in a ceiling space. Both are Type 1 indoor enclosures; the difference is access frequency, not protection.

The body is 16 gauge galvanized steel, which is the usual weight for commercial Type 1 pull and junction boxes and is stiff enough for exposed mounting in mechanical rooms, back-of-house areas and warehouses where it may take an occasional knock. Galvanized steel left unfinished also means no paint to chip in service, though it does mean indoor dry locations only.

The manufacturer part number is 664 SCGV NK from Eaton's B-Line series. Reading the code: 664 is the 6 by 6 by 4 inch size, SC is screw cover, GV is galvanized, and NK is no knockouts.

It arrives unfinished galvanized, so it reads as a grey metallic box rather than a painted grey enclosure. For an exposed run in a tenant space, galvanized takes paint fine with an etching or self-etching primer first, since bare zinc will not hold topcoat on its own. In a back-of-house or mechanical area most electricians leave it as is.