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Technical Data Sheet
PartsTable / COMPONENT / F5977
F5977 ✓ 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: 0.7018 INCHES NOMINAL IN, cone_width: 0.8640 INCHES NOMINAL IN, bore_diameter: 2.1653 INCHES NOMINAL IN, overall_width: 0.8268 INCHES NOMINAL IN, standout_width: 0.1250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-3891, 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
F5977
NSN: 3110-00-100-3891
FSC: 3110
CAGE: 21416 — HARSCO CORP FAIRMONT RAILWAY MOTORS DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.7018 INCHES NOMINAL IN
cone_width0.8640 INCHES NOMINAL IN
bore_diameter2.1653 INCHES NOMINAL IN
overall_width0.8268 INCHES NOMINAL IN
standout_width0.1250 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0930 INCHES NOMINAL IN
backface_corner_radius0.0780 INCHES NOMINAL IN
overall_outside_diameter3.9370 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-3891
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: F5977 · 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
•
CONE WIDTH: 0.8640 INCHES NOMINAL IN
•
BORE DIAMETER: 2.1653 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0780 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.0930 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
STANDOUT WIDTH: 0.1250 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)
CONE WIDTH0.8640 INCHES NOMINAL IN
BORE DIAMETER2.1653 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0780 INCHES NOMINAL IN
CONE CORNER RADIUS0.0930 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
STANDOUT WIDTH0.1250 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.9370 INCHES NOMINAL IN
OVERALL WIDTH0.8268 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
M205Interchangeable
interchangeable cross-reference
interchangeable
M205-00Interchangeable
interchangeable cross-reference
interchangeable
383AInterchangeable
interchangeable cross-reference
interchangeable
B94.19 TABLE 9Interchangeable
interchangeable cross-reference
interchangeable
40381Interchangeable
interchangeable cross-reference
interchangeable
52606Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F5977?
F5977 is a BEARING,ROLLER,TAPERED.
What parts can replace F5977?
There are 23 known substitutes for F5977: M205, M205-00, 383A and 20 more. Substitute compatibility should be verified for your specific system.
Is F5977 still available?
F5977 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