B-Line Eaton series open racks, Steel, #12-24 mounting hardware, Silver powder coat, Two mount spaces required, 200 lb load capacity, Center mount ra

Two mount spaces. The shelf is 2 inches high, so plan on 2 rack spaces of vertical room in the frame and count that against your remaining U before you order.

Yes. The SB5961919SSL is built for 19 inch racks, which is the standard EIA rail width used on nearly all network and AV frames. The shelf itself measures 19 x 17.5 x 2 inches, so it seats between the rails and extends 17.5 inches of usable surface.

It uses #12-24 mounting hardware, which is the standard thread on tapped-rail open frame racks. If your rack rails are square-hole rather than tapped, you will need #12-24 cage nuts to match. Check the rail thread on your frame first, since a 10-32 tapped rail will not take these.

A center mount shelf attaches at the middle of its depth rather than the front edge, so the load balances on either side of the rails instead of cantilevering forward. That matters on two-post open frame racks, where a front-mounted shelf carrying a heavy unit puts a lot of leverage on the posts. Use center mount for heavier gear on a two-post frame. Use a front mount or full-depth cantilever shelf when you need the whole footprint forward of the rails or you are working in a four-post cabinet.

Order it as Eaton B-Line SB5961919SSL. That number covers the steel center mount shelf, 19 inches wide by 17.5 inches deep, in silver powder coat.

It is a silver powder coat over steel, matching the silver finish used across the Eaton B-Line open frame rack line. If your existing frames are black, the shelf will not match visually, though it mounts the same either way.

The shelf weighs 13.6 lb. One person can hold it in place and start the screws, though on a tall frame it is easier with a second set of hands or a temporary rail screw set below to rest it on while you thread the top fasteners.