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Technical Data Sheet
PartsTable / COMPONENT / AS21439
AS21439 ✓ 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,NEEDLE is a the manufacturer industrial component. Key specifications include material: PLASTIC ACETAL SEAL, bore_diameter: 1.0000 INCHES NOMINAL IN, alignment_type: RIGID, surface_finish: GROUND, inner_ring_width: 2.2500 INCHES NOMINAL IN, outer_ring_width: 2.1900 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-138-7272, 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
AS21439
NSN: 3110-01-138-7272
FSC: 3110
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialPLASTIC ACETAL SEAL
bore_diameter1.0000 INCHES NOMINAL IN
seal_quantity2
alignment_typeRIGID
surface_finishGROUND
inner_ring_width2.2500 INCHES NOMINAL IN
outer_ring_width2.1900 INCHES NOMINAL IN
style_designatorAIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
bearing_seal_typeCONTACT
surface_treatmentCADMIUM INNER RING
lubrication_materialGREASE
end_item_identificationVARIOUS C-5 AIRCRAFT.
NSN3110-01-138-7272
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: AS21439 · 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
•
LUBRICATION MATERIAL: GREASEGREASE
•
SURFACE FINISH: GROUNDGROUND
•
SEAL QUANTITY: 22
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR AIRFRAME NEEDLE BEARINGSAFBMA STD TOLERANCE FOR AIRFRAME NEEDLE BEARINGS
•
OUTER RING WIDTH: 2.6900 INCHES NOMINAL2.6900 INCHES NOMINAL IN
•
INNER RING WIDTH: 2.7500 INCHES NOMINAL2.7500 INCHES NOMINAL IN
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSEMIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
LUBRICATION MATERIALGREASEGREASE
SURFACE FINISHGROUNDGROUND
SEAL QUANTITY22
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR AIRFRAME NEEDLE BEARINGSAFBMA STD TOLERANCE FOR AIRFRAME NEEDLE BEARINGS
SPECIAL FEATURESOIL HOLES AND OIL GROOVE IN INNER RING,NO OIL HOLES OR OIL GROOVE IN OUTER RINGOIL HOLES AND OIL GROOVE IN INNER RING,NO OIL HOLES OR OIL GROOVE IN OUTER RING
OUTER RING WIDTH2.6900 INCHES NOMINAL2.6900 INCHES NOMINAL IN
INNER RING WIDTH2.7500 INCHES NOMINAL2.7500 INCHES NOMINAL IN
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSEMIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALSTEEL OR STEEL CORROSION RESISTING ROLLER
MATERIALSTEEL OR STEEL CORROSION RESISTING OUTER RING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
MS21439-106Interchangeable
interchangeable cross-reference
interchangeable
AS21439Interchangeable
interchangeable cross-reference
interchangeable
MS21439-110Interchangeable
interchangeable cross-reference
interchangeable
MS21439-114Interchangeable
interchangeable cross-reference
interchangeable
MS21439-108Interchangeable
interchangeable cross-reference
interchangeable
AS39901Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS21439?
AS21439 is a BEARING,ROLLER,NEEDLE.
What parts can replace AS21439?
There are 9 known substitutes for AS21439: MS21439-106, AS21439, MS21439-110 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS21439?
AS21439 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-138-7272. 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