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Technical Data Sheet
PartsTable / COMPONENT / A13777A
A13777A ✓ 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: 0.6501 INCHES NOMINAL IN, cone_width: 0.8750 INCHES NOMINAL IN, bore_diameter: 2.0000 INCHES NOMINAL IN, overall_width: 0.8125 INCHES NOMINAL IN, standout_width: 0.1624 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-3878, 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
A13777A
NSN: 3110-00-100-3878
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.6501 INCHES NOMINAL IN
cone_width0.8750 INCHES NOMINAL IN
bore_diameter2.0000 INCHES NOMINAL IN
overall_width0.8125 INCHES NOMINAL IN
standout_width0.1624 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0620 INCHES NOMINAL IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter3.5000 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-3878
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A13777A · 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
•
BACKFACE CORNER RADIUS: 0.0460 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 3.5000 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.1624 INCHES NOMINAL IN
•
CUP WIDTH: 0.6501 INCHES NOMINAL IN
•
CONE WIDTH: 0.8750 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 (FLIS)
BACKFACE CORNER RADIUS0.0460 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL OUTSIDE DIAMETER3.5000 INCHES NOMINAL IN
STANDOUT WIDTH0.1624 INCHES NOMINAL IN
CUP WIDTH0.6501 INCHES NOMINAL IN
OVERALL WIDTH0.8125 INCHES NOMINAL IN
CONE WIDTH0.8750 INCHES NOMINAL IN
CONE CORNER RADIUS0.0620 INCHES NOMINAL IN
BORE DIAMETER2.0000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
129020Interchangeable
interchangeable cross-reference
interchangeable
3DD5Interchangeable
interchangeable cross-reference
interchangeable
1779Interchangeable
interchangeable cross-reference
interchangeable
3490-3420Interchangeable
interchangeable cross-reference
interchangeable
A-A-59649AInterchangeable
interchangeable cross-reference
interchangeable
EB510-11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A13777A?
A13777A is a BEARING,ROLLER,TAPERED.
What parts can replace A13777A?
There are 16 known substitutes for A13777A: 129020, 3DD5, 1779 and 13 more. Substitute compatibility should be verified for your specific system.
Is A13777A still available?
A13777A 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