HX-RAILB-M4: Cisco Ball Bearing Rail Kit for C220 M4 and C240 M4 rack servers
Also listed as: HX-RAILB-M4=
Cisco HX-RAILB-M4 is listed as Cisco Ball Bearing Rail Kit for C220 M4 and C240 M4 rack servers. It is a rail kit that the vendor documents for Cisco HyperFlex HX240c M5 show as an orderable option. Spares are ordered as HX-RAILB-M4=. Check the exact model and generation before buying, because option lists differ between product generations.
Specifications
| Part number | HX-RAILB-M4 |
|---|---|
| Brand | Cisco |
| Type | Rail kits |
| Other numbers | HX-RAILB-M4= |
About the HX-RAILB-M4
Cisco Ball Bearing Rail Kit for C220 M4 and C240 M4 rack servers is sold by Cisco under product ID HX-RAILB-M4; the same item ordered as a spare carries the suffix = (HX-RAILB-M4=). It is a rail kit in the Cisco option range and appears in the ordering or configuration tables of the vendor documents cited in the sources. The product ID is the number brokers and buyers search for, so match it exactly rather than by capacity or description alone.
Compatibility
The Cisco documents cited in the sources list HX-RAILB-M4 as an option for Cisco HyperFlex HX240c M5. That listing is the only compatibility claim recorded here: the part is not assumed to fit other generations or other product lines of the same brand. Firmware, software, slot, backplane and controller requirements are set out in the vendor documentation for the specific product, and the vendor's compatibility tool should be checked before ordering a second-hand unit.
Buying used
Confirm the kit is complete with both rails and the matching rack-depth hardware, and that it suits the chassis height listed for the server. Ask the seller for photos of the part number label, confirm the return terms, and test the part in a running system before accepting it. Prices vary with condition, so compare several listings for the exact product ID.
Fits these models
Check compatibility with Cisco
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Cisco has tested with the Cisco HX-RAILB-M4.
- Compatibility Cisco UCS Hardware Compatibility List
- Compatibility Cisco Optics-to-Device Compatibility Matrix
- Support Cisco Support and Downloads
Buying or selling HX-RAILB-M4?
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
- Cisco HyperFlex HX240c M5 LFF Node Spec Sheet, checked 2026-10-28