B-Line SB596V19103SFB Eaton series open frame racks, Steel, Flat black powder coat, Double sided rack mounted shelf. Heavy duty, solid shelf, four mounting spaces required, Shelves and #12-24 mounting hardware included

Plan on four mounting spaces (4U) of rack face for the SB596V19103SFB. It is a double sided rack mounted shelf, so it bolts to both the front and rear uprights, and the shelf itself stands 6 inches high. Count the four spaces on both the front and back rails when you lay out the rest of the rack.

Mounting hardware ships with it. The SB596V19103SFB includes #12-24 screws, which is the thread used on tapped-rail racks. If your rack uses 10-32 tapped rails or square-hole cage nuts instead, you will need the matching fasteners.

For anything with real mass, go double sided. The SB596V19103SFB bolts to the front and rear uprights of the rack, so the load is carried at four points instead of hanging off the front rails alone. A single sided cantilever shelf is the choice when you only have front rails available or you are setting a light item like a small switch or a monitor. This one is a heavy duty solid shelf in steel, 13.3 lb on its own.

The SB596V19103SFB has a solid deck, not a vented or mesh one, so there is no airflow up through the shelf surface. That is fine for gear that pulls side-to-side or front-to-back air, or for passive items like patch panels boxes, power strips and spare hardware. For equipment that draws cooling air from underneath, use a vented shelf instead.

It will, provided the rack has both front and rear mounting rails or a depth adapter kit, because this shelf is double sided and needs anchoring at both ends of its 20 inch depth. A plain single-plane two-post relay rack with only one set of rails will not accept it; on those, use a single sided cantilever or center-mount shelf.

Flat black powder coat over steel, which is the same finish B-Line uses across the Eaton B-Line open frame rack line, so it reads consistent with black racks and accessories already in the room. Powder coat also holds up better than paint to gear being slid on and off.

Order it as B-Line SB596V19103SFB. That is the full manufacturer part number for the 19.31 inch wide, 20 inch deep, flat black double sided heavy duty solid shelf, and it is a single configuration rather than a family of sizes.