B-Line Eaton series wiring trough, 4" height, 36" length, 4" width, HSNK wireway, Thru holes, No knockouts, Hinged cover, 4X, Steel, Hinged, ANSI 61

The 4436 HSNK is a 4 x 4 inch cross section, 36 inches long. That 4 x 4 interior is the usual size for feeder and branch circuit pulls where you need a gutter between panels or disconnects, and the 36 inch length lets you span between two enclosures without a coupling in most equipment layouts.

Yes, the 4436 HSNK is a NEMA 4X trough, so it is built for wet, outdoor, and corrosive or washdown environments, not just dry indoor gutter work. It is steel with an ANSI 61 gray finish and carries CSA C22.2 certification. If your run is indoors and dry, a NEMA 1 screw cover trough would be the cheaper type to specify.

No knockouts. The 4436 HSNK ships blank, so every conduit entry gets punched or drilled in the field to suit your run. That is normal for a 4X trough, since each opening has to be sealed with a rated hub or fitting to keep the 4X rating intact. Plan on hole saws or a knockout punch set plus watertight hubs.

The 4436 HSNK has a hinged cover, which means the cover stays attached to the body when you open it. On an elevated run or a ladder pull, that matters, since nobody is balancing a 36 inch lid. A screw cover version comes off completely and is fine at bench height or where you almost never open it. The hinged cover here is still secured to the body with plated screws when closed.

The body and cover are 16 gauge steel with an ANSI 61 gray finish. That is the standard commercial wall thickness for a 4 x 4 wireway, stiff enough to resist oil canning along a 36 inch span and to hold a punched conduit hub without deforming.

The finish is ANSI 61 gray, the standard gray used on most switchgear, panelboards, and industrial enclosures, so a run of 4436 HSNK trough reads the same as the rest of the lineup rather than standing out. Ordering additional sections in the same series keeps the color consistent across the job.