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Rail kit is sturdy and allows smooth server access.
663201-B21
HPE 1U Small Form Factor Ball Bearing Rail Kit
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663201-B21
HPE 1U Small Form Factor Ball Bearing Rail Kit
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663201-B21 is an enclosed cabinet rack designed for high-performance installations. Its 42U height in a standard 19-inch format makes it ideal for mounting essential IT equipment. Constructed from cold-rolled steel and featuring a vented door, this rack offers robust cable management and passive ventilation to ensure efficient airflow and cooling support. The design includes tool-less side panels and incorporates optional casters along with included leveling feet to accommodate various installation environments.
The rack is engineered with a front door locking mechanism to enhance security and features rails that are included for ease of equipment mounting. Its weight capacity of 501–1000 lbs makes it suitable for heavy-duty applications in network closets, data centers, telecom racks, and AV equipment installations. With expansion-ready design and a grounding kit included, 663201-B21 is an optimal choice for demanding IT infrastructure projects.
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 663201-B21 |  720865-B21 |  775167R-B21 |  H6J68A |  AF099A | |
|---|---|---|---|---|---|
| Product Type | Rack | Rack | Rack | Rack | Rack |
| Rack Type | Enclosed Cabinet | Enclosed Cabinet | Enclosed Cabinet | Enclosed Cabinet | Enclosed Cabinet |
| Mounting Type | Floor Standing | Floor Standing | Floor Standing | Floor Standing | Floor Standing |
| Rack Height (U) | 42U | 42U | 42U | 42U | 42U |
| Use Case | Data Center / Networking Closet / Telecom | Data Center / Networking Closet / Telecom | Data Center / Networking Closet / Telecom / AV Rack | Data Center / Networking Closet / AV Rack / Small Office / Server Hosting / Telecom | Data Center |
| Rack Width | 19-inch | 19-inch | 19-inch | 19-inch | 19-inch |
| Rack Depth | 800–1000mm | 600–800mm | 600–800mm | 600–800mm | 600–800mm |
| Weight Capacity | 501–1000 lbs | 501–1000 lbs | 2000+ lbs | 501–1000 lbs | 2000+ lbs |
| Material | Cold-Rolled Steel | Cold-Rolled Steel | Cold-Rolled Steel | Steel | Steel |
| Door Type | Vented Door | Vented Door | Vented Door | Vented Door | Vented Door |
| Side Panels | Tool-less | Removable | Removable | Removable | Removable |
| Cable Management | Included | Horizontal | Tool-less | Included | Included |
| Cooling Support | Passive Ventilation | Passive Ventilation | Passive Ventilation | Passive Ventilation | Passive Ventilation |
| Locking Mechanism | Front Door Lock | Front Door Lock | Front Door Lock | Front Door Lock | Front Door Lock |
| Casters | Optional | Optional | No | Included | No |
| Leveling Feet | Included | Included | Included | Included | Included |
| Rails Included | Yes | Yes | Yes | Yes | Yes |
| Expansion Ready | Yes | Yes | Yes | Yes | Yes |
| Grounding Kit Included | Yes | Yes | Yes | Yes | Yes |
| Color | Black | Black | Black | Black | Black |
| Compliance | RoHS | RoHS | UL Listed | RoHS / UL Listed | UL Listed |
| Product Name | Rack Enclosure Cabinet Model 663201-B21 | 720865-B21 Enclosed Data Rack Cabinet | 775167R-B21 Enclosed Cabinet Rack | H6J68A Enclosed Cabinet Rack | AF099A Enclosed Server Cabinet |
| Height | 73.5 inches | 73.5 inches | 73.5 inches | 73.5 inches | 73.5 inches |
| Width | 23 inches | 24 inches | 24 inches | 32 inches | 27 inches |
| Depth | 35 inches | 30 inches | 29 inches | 36 inches | 29 inches |
| Weight | 150 lbs | 750 lbs | 150 lbs | 300 lbs | 150 lbs |
Rail kit is sturdy and allows smooth server access.
Ball bearing rails feel solid.
OEM fit was perfect.
Easy installation.
Reliable mounting solution.
The HPE 1U Small Form Factor Ball Bearing Rail Kit (663201-B21) is a factory-certified rack rail assembly designed to mount 1U HPE ProLiant servers in standard EIA-310 compliant racks with smooth ball-bearing operation.
The 663201-B21 rail kit is compatible with HPE ProLiant DL360 Gen8, Gen9, Gen10 and DL320 Gen10 servers, ensuring seamless integration and reliable support.
The kit includes two ball-bearing rail assemblies, front mounting brackets, rear mounting brackets, cage nuts, screws and installation instructions for a complete 1U server rail solution.
Slide the front rail brackets into the rack’s square holes, secure with cage nuts, attach rear brackets, then slide the server into the rails until it locks, following the included installation guide.