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Technical Data Sheet
PartsTable / COMPONENT / NA691-672D
NA691-672D ✓ 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 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: 2.7500 INCHES NOMINAL IN, bore_diameter: 4.0000 INCHES NOMINAL IN, overall_width: 3.6250 INCHES NOMINAL IN, standout_width: 0.4375 INCHES NOMINAL IN, special_features: OIL HOLE AND GROOVE IN CUP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-120-1621, 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
NA691-672D
NSN: 3110-00-120-1621
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width2.7500 INCHES NOMINAL IN
bore_diameter4.0000 INCHES NOMINAL IN
overall_width3.6250 INCHES NOMINAL IN
standout_width0.4375 INCHES NOMINAL IN
special_featuresOIL HOLE AND GROOVE IN CUP
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.0310 INCHES NOMINAL IN
overall_outside_diameter6.0000 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-120-1621
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: NA691-672D · 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: 2.7500 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
•
BORE DIAMETER: 4.0000 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
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 (FLIS)
OVERALL WIDTH3.6250 INCHES NOMINAL IN
CUP WIDTH2.7500 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
SPECIAL FEATURESOIL HOLE AND GROOVE IN CUP
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
BORE DIAMETER4.0000 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
BACKFACE CORNER RADIUS0.0310 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER6.0000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
350-40Interchangeable
interchangeable cross-reference
interchangeable
3626-4Interchangeable
interchangeable cross-reference
interchangeable
13965P11Interchangeable
interchangeable cross-reference
interchangeable
1138073G1Interchangeable
interchangeable cross-reference
interchangeable
9040Interchangeable
interchangeable cross-reference
interchangeable
14763Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NA691-672D?
NA691-672D is a BEARING,ROLLER,TAPERED.
What parts can replace NA691-672D?
There are 9 known substitutes for NA691-672D: 350-40, 3626-4, 13965P11 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NA691-672D?
NA691-672D is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-120-1621. 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