HPE 2U Shelf-Mount Adjustable Rail Kit 822731-B21 (615900-002 / 615897-002)
Other Related Part Numbers: 615900-002, 615897-002
Note: (Right Rail) 615900-002 | (Left Rail) 615897-002
Overview
The 822731-B21 is an HPE 2U shelf-mount adjustable rail kit designed for high-density enterprise systems, particularly within the Apollo and ProLiant DX platforms. It provides a stable sliding shelf-style mounting solution for systems that require secure rack installation with adjustable depth support.
Key Specifications
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Form Factor: 2U
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Type: Shelf-mount adjustable rail kit
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Rail Type: Sliding rails with fixed shelf support
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Rack Support: Standard 19-inch racks
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Adjustable Depth: Yes (fits a wide range of rack depths)
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Dimensions: 806.4 mm (D) × 139.7 mm (W) × 57.1 mm (H)
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Weight: ~2.73 kg (6 lbs)
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Included Components: Left & Right rails, mounting brackets, hardware
Full Server Compatibility
HPE Apollo Series
- Apollo 4200 Gen9
- Apollo 4200 Gen10
- Apollo 2000 (select configurations)
- Apollo 4200 Gen9 (Google-configured platforms)
- Apollo 4200 Gen10 (Ezmeral / container platforms)
HPE ProLiant DX Series (Gen10)
- ProLiant DX170r Gen10
- ProLiant DX190r Gen10
- ProLiant DX2200 Gen10
- ProLiant DX2600 Gen10
Platform Compatibility by Generation (One Line)
HPE Apollo Gen9/Gen10 (4200 & select 2000 nodes) and HPE ProLiant DX Gen10 (DX170r, DX190r, DX2200, DX2600)
Rack & Installation Compatibility
- Fits standard 19-inch EIA racks
- Supports adjustable rack depth installations
- Designed for 4-post rack environments
- Shelf-style rails ideal for heavy or storage-dense systems
Important Notes
- Designed specifically for Apollo 4200 chassis and DX-series nodes (not universal across all ProLiant DL/ML servers).
- Shelf-mount design provides enhanced load stability compared to standard sliding rails.
- Requires proper rack depth clearance (~800mm) for full installation.
- Not intended for 1U systems or lightweight servers.
Summary
The HPE 822731-B21 rail kit is a specialized 2U shelf-mount adjustable rail solution built for Apollo 4200 and ProLiant DX Gen10 platforms, offering strong support, flexible rack compatibility, and reliable deployment for high-density storage and compute environments.
