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2913770-21 — BALL,BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

2913770-21: BALL,BEARING.

The BALL,BEARING is a the manufacturer industrial component. Key specifications include style_designator: BALL, rolling_element_diameter: 0.3125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-031-5316, 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
2913770-21
NSN: 3110-01-031-5316
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 11243 — COSMODYNE, LLC DBA COSMODYNE LLC (USA)
SPECIFICATIONS
style_designatorBALL
rolling_element_diameter0.3125 INCHES NOMINAL IN
NSN3110-01-031-5316
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 2913770-21 · 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
•
ROLLING ELEMENT DIAMETER: 0.3125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: BALL
TECHNICAL CHARACTERISTICS
ROLLING ELEMENT DIAMETER0.3125 INCHES NOMINAL IN
STYLE DESIGNATORBALL
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2913770-21?
2913770-21 is a BALL,BEARING.
What is the NSN for 2913770-21?
2913770-21 is cataloged in the U.S. Government catalog under NSN 3110-01-031-5316. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.