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45U 4-Post Flex Depth Rack 24.25" x 36"D M6 Square Holes 2500lbs

Freedom and flexibility in an adjustable 7-foot-high rack with M6 rails.


4 In Stock
Same Day Shipping (before 5PM ET)
Lifetime Double Diamond™ Warranty (Standard)

*Required field

Product Features

  • Weight capacity of 2500 pounds.
  • A four-post, 23" wide adjustable rack with M6 rails.
  • Combines the economy and accessibility of a rack with the mounting capacity and shape of a cabinet.
  • Guaranteed for life!


  • Change the depth in this adjustable four-post rack in 1" increments from 17" to more than 41" to fit different equipment.
  • Open design provides you with access to all sides of mounted equipment and cables when troubleshooting.
  • Cross-connects aren't hindered by cabinet walls.
  • Strong enough to hold heavy servers and equipment—up to 2500 pounds.
  • Holds 19" wide servers, panels, and other components.
  • Has M6 (square hole) pattern on rails that meets EIA standards.
  • Features durable 12-gauge steel uprights.
  • Ships to you unassembled, allowing for easy transport to a job site.
  • Predrilled mounting holes at the base enable you to anchor the rack to the floor for a safe and secure installation.
  • Smooth black polyester powder paint finish.
  • UL® 1863 listed.
  • Link multiple racks side-to-side with the joining kit (order separately).
  • Various optional shelves are also available*.

  • *NOTE: For mounting standard 19" shelves in the 23" rack, you'll need 19"-to-23" Rackmount Adapters. See our 37906, 37907, 37908, 37909, and 37910 adapters, or contact our FREE Tech Support.

    Tech Specs

    cUL 0
    UL 0
    Depth Adjustable from 17.72 to 41.34" (45 to 104.93 cm) in 1" (2.5-cm) increments
    Overall Height 84" (213.4 cm)
    Rack Load Capacity 2500 lb.
    Rack Units 45U
    Standards UL® 1863 Listed; EIA 310-D; cUL
    Weight 75 lb. (34 kg)
    Width 24.25" (62 cm)
    This product works with: - Freedom Rack Plus Vented Shelves - Freedom Rack Plus Keyboard Shelf - 19" Sliding, Pivoting Keyboard Tray with Side Mouse Tray - Freedom Rack Plus Joining Kit

    * Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.



    Double Diamond Warranty Diamond

    Double Diamond™ Warranty (Standard)

    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The 45U 4-Post Flex Depth Rack 24.25" x 36"D M6 Square Holes 2500lbs comes with a standard Lifetime Double Diamond™ Warranty (Standard) already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.