B-Line Eaton series wireway telescoping fitting, 6" X 6" feed through, Wireway telescoping fitting, 4X, Stainless steel, Brushed finish

Yes. The Eaton B-Line 66-4XSFT is sized for 6 inch by 6 inch wireway, with a 6 inch height and 6 inch width matching the trough cross section. It is a feed through fitting, so conductors run straight through it rather than turning a corner. Use it where two runs of 6 x 6 wireway need to be joined and one end can't be moved.

It is rated NEMA 4X, which covers outdoor use and hosedown or washdown environments where corrosion resistance is needed, such as food processing, car washes and coastal exteriors. The body is stainless steel with a brushed finish, which is what earns the 4X corrosion rating. It is also UL Listed. To hold that rating the rest of the run and every joint has to be 4X as well, so don't mix it into a painted steel type 1 wireway and expect a 4X system.

A telescoping fitting closes a gap in a wireway run where the two sections can't be pulled together, such as between two fixed enclosures or a run built up to a wall on both ends. It slides to take up the difference instead of requiring an exact-length section. The 66-4XSFT covers that in 6 x 6 wireway and measures 15.5 inches in length, so it absorbs the slack within that span. Where both ends of the run are free to move, a standard coupling is the simpler choice.

Yes, it carries a UL Listing, which is normally what an AHJ wants to see on wireway and its fittings in a commercial or institutional install. It is also NEMA 4X rated stainless steel. The manufacturer part number to cite on a submittal is 66-4XSFT, Eaton B-Line series.

Stainless steel with a brushed finish, not painted. That matters for two reasons on a spec job: it won't chip or need touch-up paint at cut edges, and it visually matches adjacent stainless wireway and stainless enclosures in a plant or kitchen. The fitting weighs 10.952 lb, so plan the run supports accordingly.

The fitting measures 15.5 inches overall in length, with a 6 by 6 inch cross section. Because it telescopes, the installed span varies as you adjust it to close the gap, so lay out the run knowing you have that 15.5 inch piece to work within rather than treating it as a fixed-length section.