PartsTable
Technical Data Sheet
Download PDF

M2691A — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

M2691A: BEARING,ROLLER,TAPERED.

The BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, cup_width: 0.9200 INCHES NOMINAL IN, cone_width: 1.2500 INCHES NOMINAL IN, bore_diameter: 1.7711 INCHES NOMINAL IN, overall_width: 1.2800 INCHES NOMINAL IN, standout_width: 0.3600 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-923-8569, 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
M2691A
NSN: 3110-00-923-8569
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.9200 INCHES NOMINAL IN
cone_width1.2500 INCHES NOMINAL IN
bore_diameter1.7711 INCHES NOMINAL IN
overall_width1.2800 INCHES NOMINAL IN
standout_width0.3600 INCHES NOMINAL IN
special_featuresDUTY CLASS HM SERIES
style_designatorSTRAIGHT BORE, STEEP ANGLE
cone_corner_radius0.1000 INCHES NOMINAL IN
backface_corner_radius0.1000 INCHES NOMINAL IN
overall_outside_diameter4.1333 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-923-8569
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M2691A · 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
KEY FEATURES
•
CUP WIDTH: 0.9200 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, STEEP ANGLE
•
OVERALL OUTSIDE DIAMETER: 4.1333 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1000 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1000 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.3600 INCHES NOMINAL IN
•
CONE WIDTH: 1.2500 INCHES NOMINAL IN
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
TECHNICAL CHARACTERISTICS
CUP WIDTH0.9200 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, STEEP ANGLE
OVERALL WIDTH1.2800 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER4.1333 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1000 INCHES NOMINAL IN
CONE CORNER RADIUS0.1000 INCHES NOMINAL IN
STANDOUT WIDTH0.3600 INCHES NOMINAL IN
CONE WIDTH1.2500 INCHES NOMINAL IN
SPECIAL FEATURESDUTY CLASS HM SERIES
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
SUBSTITUTES & CROSS-REFERENCES 2
M2691Reference document
Same NSN cross-reference
Reference document — Secondary reference
HM905843HM905810Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
Ready to buy M2691A?
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 M2691A?
M2691A is a BEARING,ROLLER,TAPERED.
What parts can replace M2691A?
There are 2 known substitutes for M2691A: M2691, HM905843HM905810. Substitute compatibility should be verified for your specific system.
What is the NSN for M2691A?
M2691A is cataloged in the U.S. Government catalog under NSN 3110-00-923-8569. 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 — M2691A

✓ 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.