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Technical Data Sheet
PartsTable / COMPONENT / BM-5-8
BM-5-8 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The CUP,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, head_style: PAN, head_height: 2.8 MILLIMETERS NOMINAL MM, head_diameter: 9.5 MILLIMETERS NOMINAL MM, fastener_length: 8.0 MILLIMETERS NOMINAL MM, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0305, 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
BM-5-8
NSN: 3110-00-100-0305
FSC: 3110
CAGE: 13841 — TIFFIN PARTS, L.L.C. DIV SUBSIDIARY OF PETTIBONE CORP. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_stylePAN
head_height2.8 MILLIMETERS NOMINAL MM
head_diameter9.5 MILLIMETERS NOMINAL MM
fastener_length8.0 MILLIMETERS NOMINAL MM
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats4.5 MILLIMETERS NOMINAL MM
internal_drive_styleHEXAGON
nominal_thread_diameter5.0 MILLIMETERS MM
thread_series_designatorM
part_name_assigned_by_controlling_agencySIX LOBE SOCKET BUTTON HEAD SCREW
NSN3110-00-100-0305
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: BM-5-8 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
5295Interchangeable
interchangeable cross-reference
interchangeable
93-400Interchangeable
interchangeable cross-reference
interchangeable
1771669Interchangeable
interchangeable cross-reference
interchangeable
108931Interchangeable
interchangeable cross-reference
interchangeable
108946Interchangeable
interchangeable cross-reference
interchangeable
394AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BM-5-8?
BM-5-8 is a CUP,TAPERED ROLLER BEARING.
What parts can replace BM-5-8?
There are 20 known substitutes for BM-5-8: 5295, 93-400, 1771669 and 17 more. Substitute compatibility should be verified for your specific system.
Is BM-5-8 still available?
BM-5-8 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026