770-BCKW: Dell ReadyRails II Sliding Rails for 2U PowerEdge Servers (B6)
Also listed as: 0H4X6X, H4X6X, 790-BCKW
The Dell 770-BCKW is a Dell ReadyRails II Sliding Rails for 2U PowerEdge Servers (B6) providing tool-less rack mounting and maintenance sliding access for Dell PowerEdge R740, R740XD, R750, R750XS servers.
Specifications
| Part number | 770-BCKW |
|---|---|
| Brand | Dell |
| Type | Rail kits |
| Other numbers | 0H4X6X, H4X6X, 790-BCKW |
| Status | current |
| Form factor | 2U Sliding Rack Rail Kit |
| Rack mount type | Tool-less 4-post square hole & round hole, tooled 4-post threaded hole |
| Rail extension | Full extension sliding rails with locking travel stops |
| Cable management | Compatible with optional 2U Cable Management Arm (CMA) |
About the 770-BCKW
The Dell 770-BCKW is a Dell ReadyRails II Sliding Rails for 2U PowerEdge Servers (B6) engineered to mount Dell PowerEdge servers into standard 19-inch equipment racks. Built with heavy-gauge steel ball-bearing sliding mechanisms or static brackets, the 770-BCKW provides tool-less installation into square-hole or unthreaded round-hole four-post server racks.
Compatibility
Designed for Dell PowerEdge R740, R740XD, R750, R750XS servers, the 770-BCKW accommodates standard rack depths and integrates with optional cable management arms. The 770-BCKW supports square-hole and round-hole racks using Dell ReadyRails mounting brackets, and can adapt to threaded four-post racks with optional adapter kits.
How to identify a genuine unit
Genuine Dell 770-BCKW rail assemblies carry stamped part numbers including DP/N 0H4X6X, Left/Right rail indicators (L/R), and rack depth adjustment markings. Quick-release blue latch buttons on the 770-BCKW facilitate tool-free installation and removal from equipment rack posts.
Buying used
When purchasing pre-owned 770-BCKW rails, inspect the inner and outer sliding tracks to ensure ball bearings glide smoothly without binding or missing ball cages. Verify that both front and rear spring-loaded latch pins on the 770-BCKW engage securely, and confirm that both left and right rail assemblies are included.
Fits these models
- Dell PowerEdge R740
- Dell PowerEdge R740xd
- Dell PowerEdge R750
- Dell PowerEdge R750xs
- Dell PowerEdge R760
- Dell PowerEdge R760xs
- Dell PowerEdge R540
- Dell PowerEdge R550
Equivalent part numbers
- Dell H4X6X Dell direct spare part number for 2U ReadyRails II sliding rail kit
FAQ
Do ReadyRails II require tools for installation in standard server racks?
No, they snap tool-lessly into standard 19-inch 4-post square-hole and round-hole racks; threaded-hole racks require the optional adapter kit.
Can these rails accommodate a Cable Management Arm (CMA)?
Yes, they feature dedicated rear snap-in brackets for the Dell 2U ReadyRails Cable Management Arm.
Buying or selling 770-BCKW?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Dell ReadyRails II Sliding Rails for 2U Systems, checked 2026-10-27