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2839-900020 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

2839-900020: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, special_features: NHA RATE-OF-TURN SENSOR, PART NUMBER 772-5140-002 (345A-7) T.O. 12R5-4-129-11.

A, end_item_identification: B-1B LANCER BOMBER AIRCRAFT, part_name_assigned_by_controlling_agency: BALL BEARING. This part is cataloged in the U.S. Government catalog under NSN 3110-01-570-2733, 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
2839-900020
NSN: 3110-01-570-2733
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 16455 — UNITED INSTRUMENTS INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
special_featuresNHA RATE-OF-TURN SENSOR, PART NUMBER 772-5140-002 (345A-7) T.O. 12R5-4-129-11. A
end_item_identificationB-1B LANCER BOMBER AIRCRAFT
part_name_assigned_by_controlling_agencyBALL BEARING
NSN3110-01-570-2733
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 2839-900020 · 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
•
BORE SHAPE: STRAIGHT
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
BORE SHAPESTRAIGHT
SPECIAL FEATURESNHA RATE-OF-TURN SENSOR, PART NUMBER 772-5140-002 (345A-7) T.O. 12R5-4-129-11. A
PART NAME ASSIGNED BY CONTROLLING AGENCYBALL BEARING
END ITEM IDENTIFICATIONB-1B LANCER BOMBER AIRCRAFT
MATERIALSTEEL OVERALL
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2839-900020?
2839-900020 is a BEARING,BALL,ANNULAR.
What is the NSN for 2839-900020?
2839-900020 is cataloged in the U.S. Government catalog under NSN 3110-01-570-2733. 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.