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

No. The 644 SC is a NEMA Type 1 enclosure, which is indoor use only for protection against incidental contact and falling dirt. It offers no protection against rain, hose-down, dust, or oil. For outdoor or wet locations you need a Type 3R, 4, or 4X box instead. The 644 SC also has a screw-on cover with no gasket, and carbon steel construction with a painted finish, so moisture exposure will eventually corrode it.

Knockouts are already provided: 3 on the side, 2 on the top, and 2 on the bottom. That covers a straight-through pull or a side feed without pulling out a punch set. If your conduit run needs an entry where there is no knockout, you will be drilling or punching the 16 gauge carbon steel yourself.

It is a surface mount box with thru holes in the back for fasteners, so it bolts flat to a wall, stud, strut, or backboard. Mounting hardware is not part of the box, so pick anchors or machine screws to suit the substrate. The cover itself uses keyhole slots and plated screws, which means you can back the screws out part way and lift the cover off without losing them.

6 x 4 x 4 inches: 6 inch height, 4 inch width, 4 inch length/depth. It is a small single-door style box, so plan your wire fill and conduit entries around that internal volume before committing. Shipping weight is 2.4 lb.

A screw cover box such as the 644 SC suits a pull point or splice you rarely open, since the cover comes fully off and needs a screwdriver each time. Where you expect frequent access for terminations, testing, or device adjustment, a hinged door enclosure is the better choice because the cover stays captive and swings clear. The keyhole slots on this cover do make removal quicker than plain tapped holes.

Order Eaton B-Line model 644 SC. The number reads off the size and cover: 6 x 4 x 4 inches with a screw cover.

Painted carbon steel in ANSI 61 grey, the standard grey used across most industrial control and distribution gear, so it sits alongside existing panels and enclosures without looking out of place. If your facility standard is white or a custom color, this box will need field painting.

16 gauge carbon steel is the common commercial weight for small junction boxes and holds up fine to normal handling and conduit loading indoors. The limit is the NEMA 1 rating, not the steel: in a damp garage, a wash bay, or anywhere exposed to water spray, the enclosure type rules it out regardless of wall thickness.