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Technical Data Sheet
PartsTable / STORAGE_HDD / MS17161-81
MS17161-81 ✓ Verified by PartsTable
— · 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

IBM 17.54GB 10K RPM Ultra SCSI Disk Unit. Key specifications include material: STEEL COMP E50100 OR STEEL COMP E51100 OVERALL, alignment_type: RIGID, overall_height: 0.8745 INCHES MINIMUM AND 0.8755 INCHES MAXIMUM IN, surface_finish: GROUND, style_designator: GROOVED RACE SURFACE, bore_smallest_diameter: 2.2500 INCHES MINIMUM AND 2.2510 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-1778, 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→ MS17161-81
NSN: 3110-00-156-1778
FSC: 3110
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP E50100 OR STEEL COMP E51100 OVERALL
alignment_typeRIGID
overall_height0.8745 INCHES MINIMUM AND 0.8755 INCHES MAXIMUM IN
surface_finishGROUND
style_designatorGROOVED RACE SURFACE
bore_smallest_diameter2.2500 INCHES MINIMUM AND 2.2510 INCHES MAXIMUM IN
overall_outside_diameter3.3436 INCHES MINIMUM AND 3.3438 INCHES MAXIMUM IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR THRUST BEARINGS
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
thrust_directional_capability_designationSINGLE
NSN3110-00-156-1778
COMPONENT DIAGRAM
LABEL 17.54GB HDD SAS 12Gb/s 69.85 mm (2.75") 100.0 mm 2.5" HDD — MECHANICAL Spinning disk, hot-swap SAS 12Gb/s — Dual-port 17.54GB | 7200 / 10K / 15K RPM FORM FACTOR — 2.5" Hot-swap, carrier-specific MOUNTING — 4x M3 bottom Standard SFF screw pattern TITLE HDD DRIVE PN MS17161-81 MFR IBM 17.54GB 10K RPM Ultra SCSI Disk Unit
KEY FEATURES
•
17.54GB Capacity
•
10K RPM Speed
•
BORE SMALLEST DIAMETER: 2.2500 INCHES MINIMUM AND 2.2510 INCHES MAXIMUM IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR THRUST BEARINGS
•
ALIGNMENT TYPE: RIGID
•
SURFACE FINISH: GROUND
•
THRUST DIRECTIONAL CAPABILITY DESIGNATION: SINGLE
•
MATERIAL: STEEL COMP E50100 OR STEEL COMP E51100 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
BORE SMALLEST DIAMETER2.2500 INCHES MINIMUM AND 2.2510 INCHES MAXIMUM IN
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR THRUST BEARINGS
ALIGNMENT TYPERIGID
SURFACE FINISHGROUND
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
OVERALL HEIGHT0.8745 INCHES MINIMUM AND 0.8755 INCHES MAXIMUM IN
MATERIALSTEEL COMP E50100 OR STEEL COMP E51100 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL OUTSIDE DIAMETER3.3436 INCHES MINIMUM AND 3.3438 INCHES MAXIMUM IN
STYLE DESIGNATORGROOVED RACE SURFACE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
4318PInterchangeable
interchangeable cross-reference
interchangeable
4318Interchangeable
IBM 17.54GB 10K RPM Ultra SCSI Disk Unit
interchangeable
4308Interchangeable
interchangeable cross-reference
interchangeable
70-0060-9577-5Interchangeable
interchangeable cross-reference
interchangeable
GS550H08-5Interchangeable
interchangeable cross-reference
interchangeable
CL-43-SHSInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS17161-81?
MS17161-81 is a IBM 17.54GB 10K RPM Ultra SCSI Disk Unit. It is classified as a STORAGE_HDD (2.5_SAS_HDD).
What parts can replace MS17161-81?
There are 20 known substitutes for MS17161-81: 4318P, 4318, 4308 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS17161-81?
MS17161-81 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-1778. 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