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Rails were easy to install and felt very secure.
733660-B21
2U SFF EASY INSTALL RAIL KIT PL=SI
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$125.00
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733660-B21
2U SFF EASY INSTALL RAIL KIT PL=SI
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733660-B21 is an enclosed cabinet rack designed for high-performance installations in network closets and data centers. With a 42U height and a standard 19-inch mounting interface, it features a vented door for optimal airflow, a standard 600–800mm depth, and robust support designed to handle a weight capacity of 2000+ lbs.
Engineered with advanced cable management and passive cooling support, 733660-B21 also includes integrated casters and leveling feet for easy mobility and secure, level placement. Its reliable front door locking mechanism makes it ideal for telecom racks and AV equipment setups in demanding environments.
733660-B21 price is $43.00, a 65.6% saving from the Hpe list price of $125.00. 733660-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 733660-B21 for additional pricing. Browse the full Hpe Racks series or explore all Hpe products.
In large-scale data centers running HPE ProLiant Gen10 servers, the 733660-B21 2U SFF Easy Install Rail Kit PL=SI enables tool-less, slide-out installation. IT managers reduce rack-mount time by 40%, accelerate provisioning of compute nodes, and optimize floor space for up to 25% more servers per cabinet—delivering faster time-to-service and improved operational agility.
During scheduled maintenance windows on VMware ESXi clusters, system administrators use the 733660-B21 rail kit to hot-swap 2U SFF blades with zero-touch rail brackets. This streamlined workflow cuts hardware replacement time from 30 to 5 minutes per node, minimizes service interruptions, and ensures 99.99% SLA compliance for mission-critical applications.
When deploying compact edge servers in retail stores or telecom PoPs, field engineers install HPE DL360 servers using the 733660-B21 rail kit for rapid rack integration. The durable, pre-aligned rails support repeatable installs across 50+ remote sites, reducing on-site labor by 60% and enabling consistent compute performance at distributed locations.
To get the detailed certification, please go to the Compliance Center.
 733660-B21 |  P9K38A |  H6J77A |  J9583AR |  H6F54A | |
|---|---|---|---|---|---|
| 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 / AV Rack | Data Center / Networking Closet / Telecom / AV Rack | Data Center / Networking Closet / Telecom / AV Rack | Data Center / Networking Closet / Telecom | Data Center / Networking Closet / Telecom |
| Rack Width | 19-inch | 19-inch | 19-inch | 19-inch | 19-inch |
| Rack Depth | 600–800mm | 600–800mm | 800–1000mm | 600–800mm | 600–800mm |
| Weight Capacity | 2000+ lbs | 501–1000 lbs | 2000+ lbs | 501–1000 lbs | 501–1000 lbs |
| Material | Steel | Cold-Rolled Steel | Cold-Rolled Steel | Cold-Rolled Steel | Steel |
| Door Type | Vented Door | Vented Door | Vented Door | Vented Door | Vented Door |
| Side Panels | Tool-less | Removable | Fixed | Removable | Tool-less |
| Cable Management | Brush Panels | Included | Included | 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 | Included | Included | Optional | Optional | Included |
| 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 | UL Listed / CE | RoHS | RoHS / UL Listed / CE | CE | UL Listed |
| Product Name | 733660-B21 Enclosed Server Rack Cabinet | P9K38A Enclosed Server Rack | H6J77A Enclosed Server Rack | J9583AR Enclosed Cabinet Rack | H6F54A Enterprise Enclosed Cabinet |
| Height | 84 inches | 78 inches | 84 inches | 73.5 inches | 73.5 inches |
| Width | 24 inches | 24 inches | 24 inches | 24 inches | 19 inches |
| Depth | 30 inches | 30 inches | 36 inches | 28 inches | 28 inches |
| Weight | 250 lbs | 350 lbs | 350 lbs | 350 lbs | 850 lbs |
Rails were easy to install and felt very secure.
Smooth sliding mechanism simplified server maintenance.
Strong build quality and perfect fit.
Saved time during rack installation.
Reliable rail kit for SFF systems.
The HPE 2U SFF Easy Install Rail Kit PL=SI (733660-B21) is a tool-less, sliding rail assembly engineered to mount HPE 2U small form factor servers into standard 19” racks quickly and securely.
This rail kit is compatible with any EIA-compliant 19″ relay-rack or cabinet with a depth of 600–1,200 mm, supporting both threaded and square-hole rails.
The 2U SFF Easy Install Rail Kit supports HPE ProLiant DL360, DL380, and DL560 series servers in a 2U, small form factor chassis configuration.
No. The easy-install design features latch-and-slide rails that snap into place without tools, reducing rack-mount time by up to 50%.