PartsTable
Technical Data Sheet
Download PDF

ST157A — DISK DRIVE UNIT

✓ Government record, cited
— · STORAGE_HDD · 3.5_SATA_HDD
PRODUCT OVERVIEW

ST157A: DISK DRIVE UNIT.

The DISK DRIVE UNIT is a the manufacturer hard disk drive designed for enterprise environments demanding consistent performance and data integrity. Key specifications include drive_size: 3.50, design_type: HARD DISK, drive_height: HALF, overall_width: 4.000 INCHES NOMINAL IN, overall_height: 1.630 INCHES NOMINAL IN, overall_length: 5.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 7025-01-348-9591, 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→ 3.5_SATA_HDD→ ST157A
NSN: 7025-01-348-9591
FSC: 7025 — Information Technology Input/output and Storage Devices
CAGE: 65867 — SEAGATE TECHNOLOGY (USA)
SPECIFICATIONS
drive_size3.50
design_typeHARD DISK
drive_heightHALF
overall_width4.000 INCHES NOMINAL IN
overall_height1.630 INCHES NOMINAL IN
overall_length5.750 INCHES NOMINAL IN
data_storage_capacity44.70 KILOBYTES
NSN7025-01-348-9591
COMPONENT DIAGRAM
RELEASE LATCH — NL-SAS 7.2K ST157A OEM NL-SAS INTERFACE INTERPOSER SAS drive in SATA tray? Check board compatibility 3.5" (101.6 x 146mm) LFF 3.5" DRIVE | — | NL-SAS 7.2K NL-SAS uses SAS protocol at 7.2K RPM | SAS backplane supports SATA, not reverse Tray generation matters | Gen8 LFF tray differs from Gen10 TITLE LFF 3.5" DRIVE PN ST157A MFR OEM
KEY FEATURES
•
DESIGN TYPE: HARD DISK
•
DRIVE SIZE: 3.50
•
DRIVE HEIGHT: HALF
•
DATA STORAGE CAPACITY: 44.70 KILOBYTES
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
OVERALL HEIGHT1.630 INCHES NOMINAL IN
DESIGN TYPEHARD DISK
OVERALL LENGTH5.750 INCHES NOMINAL IN
DRIVE SIZE3.50
OVERALL WIDTH4.000 INCHES NOMINAL IN
DRIVE HEIGHTHALF
DATA STORAGE CAPACITY44.70 KILOBYTES
OTHER ITEMS IN FSC 7025 — Information Technology Input/output and Storage Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
7025-00-001-2681 7025-00-001-5588 7025-00-001-6998 7025-00-001-6999 7025-00-001-7000 7025-00-001-7025 7025-00-001-7026 7025-00-001-7027
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy ST157A?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is ST157A?
ST157A is a DISK DRIVE UNIT. It is classified as a STORAGE_HDD (3.5_SATA_HDD).
What is the NSN for ST157A?
ST157A is cataloged in the U.S. Government catalog under NSN 7025-01-348-9591. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — ST157A

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.