B-Line Eaton series Type 1 junction boxes, 6" height, 4" length, 6" width, 1, Screw cover, SC enclosure, Surface mounted, Small single door, 3 side k

No. The 664 SC carries a NEMA Type 1 rating, which is indoor use only, with no protection against water, dust ingress or corrosive washdown. Put it in dry indoor locations such as mechanical rooms, back-of-house corridors and electrical closets. If the location sees rain, hosing or damp, you need a Type 3R or Type 4 enclosure instead.

6 inches high, 6 inches wide and 4 inches deep. That 4 inch depth is what usually decides the job, since it sets how much room you have behind the cover for conduit fittings, wire bends and splice caps. Weight is 3.1 lb, so a single installer can hold it up while marking the mounting holes.

Knockouts are provided: three on each side, three on top and three on the bottom. That gives you feed and exit points on four faces without pulling out a punch, which matters when the box is going in tight against framing and you only have one usable approach. The back is a solid surface with thru holes for mounting.

It is a surface mount box with thru holes in the back pan, so fasteners pass through the enclosure into the substrate. You supply the anchors or screws to suit what you are fixing to, whether that is drywall with toggles, unistrut, block or plywood backer. The cover itself has keyhole slots, so once the cover screws are backed off partway the cover lifts away without fully removing them.

A screw cover box suits splices, pull points and terminations you rarely need to open. The 664 SC cover is retained by plated screws, and the keyhole slots let it come off without fully removing them, but it is still a two hand job on a ladder. If the box holds controls, relays or anything you will open routinely, a hinged door enclosure is easier to live with. For a one time junction or pull point behind a ceiling or on a wall, screw cover is the standard choice.

Carbon steel at 16 gauge, painted ANSI 61 gray. ANSI 61 is the standard gray used across most commercial electrical gear, so it matches panels and control enclosures already in the room. The cover screws are plated. Being painted carbon steel, it wants a dry indoor location, consistent with its Type 1 rating.

The enclosure is built to UL 50, the standard covering enclosures for electrical equipment, and it is manufactured in the US. For a spec that calls out a UL 50 Type 1 painted steel screw cover box, the 664 SC answers it directly.

Order it as B-Line (Eaton) 664 SC. The number reads as the dimensions: 6 high, 6 wide, 4 deep, with SC for screw cover. That naming pattern is how the rest of the family is called out too, so a 6x6x6 or an 8x8x4 follows the same logic when you are standardizing box sizes across a building.