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Technical Data Sheet
PartsTable / STORAGE_HDD / 431958-B21
431958-B21 ✓ Verified by PartsTable
HP · STORAGE_HDD · 2.5_SAS_HDD
WHAT YOU NEED TO KNOW
SAS HDD backplane accepts SATA drives, SATA backplane does NOT accept SAS 2.5" SAS HDDs come with or without carrier/tray — ALWAYS ASK
ALWAYS confirm carrier/tray PN — server-specific trays vary by generation
PRODUCT OVERVIEW
HP 146GB 10K 2.5 SP 3G SAS HOTSWAP HDD

Serial Attached SCSI is the logical evolution of SCSI, including its long-established software advantage and the Serial ATA electrical and physical connection interface. SAS meets all these demands while providing the highest performance. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-548-5868, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
STORAGE_HDD→ 2.5_SAS_HDD→ SFF BAY→ 431958-B21
NSN: 7025-01-548-5868
FSC: 7025
CAGE: 0KE38 — HEWLETT-PACKARD CO PRODUCT SUPPORT DIV (USA)
SPECIFICATIONS
Part Number431958-B21
ManufacturerHP
Form FactorSFF
Capacity146GB
Speed10K RPM
NSN7025-01-548-5868
COMPONENT DIAGRAM
LABEL 146GB HDD SAS 12Gb/s 69.85 mm (2.75") 100.0 mm SFF HDD — MECHANICAL Spinning disk, hot-swap SAS 12Gb/s — Dual-port 146GB | 7200 / 10K / 15K RPM FORM FACTOR — SFF Hot-swap, carrier-specific MOUNTING — 4x M3 bottom Standard SFF screw pattern TITLE HDD DRIVE PN 431958-B21 MFR HP HP 146GB 10k 2.5 Sp 3G SAS Hotswap HDD
KEY FEATURES
•
SFF Form Factor
•
146GB Capacity
•
10K RPM Speed
•
UNIT DESIGN: INTERNAL
•
DATA STORAGE CAPACITY: 146.00 GIGABYTES
•
DRIVE SIZE: 2.50
•
INTERFACE TYPE: RS 422
•
OPERATING TEMP RANGE: +10.0 TO 35.0 CELSIUS DEGC
•
DESIGN TYPE: HARD DISK
•
DRIVE QUANTITY: 1
TYPICAL APPLICATIONS
  • Enterprise storage arrays and SANs
  • Direct-attached storage (DAS) expansion
  • Database tier storage (OLTP, OLAP)
  • Virtual machine datastore expansion
  • Backup-to-disk and disaster recovery targets
  • Content delivery and media streaming storage
TECHNICAL CHARACTERISTICS (FLIS)
UNIT DESIGNINTERNAL
DATA STORAGE CAPACITY146.00 GIGABYTES
SPECIAL FEATURESHARD DRIVE,HOT-SWAP,SAS,10000 RPM RPM
DRIVE SIZE2.50
INTERFACE TYPERS 422
OPERATING TEMP RANGE+10.0 TO 35.0 CELSIUS DEGC
DESIGN TYPEHARD DISK
DRIVE QUANTITY1
UNIT DESIGNINTERNAL
DATA STORAGE CAPACITY146.00 GIGABYTES
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
431958-B21Upgraded Successor
HP 146GB 10k 2.5 Sp 3G SAS Hotswap HDD
successor
C99A9424-5Upgraded Successor
successor cross-reference
successor
431954-003Interchangeable
Same NIIN cross-reference
interchangeable
FXDSK0335Interchangeable
Same NIIN cross-reference
interchangeable
431958R-B21Interchangeable
Same NIIN cross-reference
interchangeable
L-3 010Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 17
AD333ASUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
DG146A3516SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
DG146A4960SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
DG146ABAB4SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
GE261AASUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
375863-011SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
375863-012SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
431954-003SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
432320-001SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
436649-B21SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
437862-001SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
438628-002SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
442819-B21SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
443177-002SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
449208-001SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
453138-001SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
613989-001SUBSTITUTE
HP 146Gb SAS 3G 10K SFF SP ST HDD
HPE
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FREQUENTLY ASKED QUESTIONS
What is 431958-B21?
431958-B21 is a HP 146GB 10k 2.5 Sp 3G SAS Hotswap HDD manufactured by HP. It is classified as a STORAGE_HDD (2.5_SAS_HDD).
What parts can replace 431958-B21?
There are 19 known substitutes for 431958-B21: 431958-B21, C99A9424-5, 431954-003 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 431958-B21?
431958-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-548-5868. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026