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Technical Data Sheet
PartsTable / COMPONENT / AS27641-4
AS27641-4 ✓ 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,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE SEAL, bore_diameter: 0.2500 INCHES NOMINAL IN, load_direction: RADIAL, inner_ring_width: 0.2810 INCHES NOMINAL IN, outer_ring_width: 0.2190 INCHES NOMINAL IN, style_designator: SINGLE ROW INNER RING EXTENDED BOTH SIDES. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-030-3381, 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
AS27641-4
NSN: 3110-00-030-3381
FSC: 3110
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE SEAL
bore_diameter0.2500 INCHES NOMINAL IN
seal_quantity2
load_directionRADIAL
inner_ring_width0.2810 INCHES NOMINAL IN
outer_ring_width0.2190 INCHES NOMINAL IN
style_designatorSINGLE ROW INNER RING EXTENDED BOTH SIDES
bearing_seal_typeCONTACT
surface_treatmentCADMIUM EXPOSED SURFACES AS MOUNTED
overall_outside_diameter0.7500 INCHES NOMINAL IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OUTER RING
NSN3110-00-030-3381
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: AS27641-4 · 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
•
INNER RING WIDTH: 0.2810 INCHES NOMINAL IN
•
BEARING SEAL TYPE: CONTACT
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
•
OUTER RING WIDTH: 0.2190 INCHES NOMINAL IN
•
SEAL QUANTITY: 2
•
LOAD DIRECTION: RADIAL
TECHNICAL CHARACTERISTICS (FLIS)
INNER RING WIDTH0.2810 INCHES NOMINAL IN
SPECIAL FEATURES80 PCT FULL OF MIL-G-81322 ALSO INTERNAL RADIAL CLEARANCE 0.0004-0.0010 IN. ALSO HEAT TREAT RINGS AND BALLS TO ROCKWELL C60 TO C66 AND STABILIZED FOR OPERATION AT 250 DEG F ALSO RADIAL AND LATERAL ECCENTRICITY INNER RING 0.0010 IN. OUTER RING 0.0016 IN. IN
BEARING SEAL TYPECONTACT
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
OUTER RING WIDTH0.2190 INCHES NOMINAL IN
SEAL QUANTITY2
LOAD DIRECTIONRADIAL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES BALL
MATERIALSTEEL COMP E51100 OR STEEL COMP E52100 BALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
AS27641Interchangeable
interchangeable cross-reference
interchangeable
MKP20AInterchangeable
interchangeable cross-reference
interchangeable
MS27641-10Interchangeable
interchangeable cross-reference
interchangeable
561-6404325-31Interchangeable
interchangeable cross-reference
interchangeable
MS27641-12Interchangeable
interchangeable cross-reference
interchangeable
AS7949Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS27641-4?
AS27641-4 is a BEARING,BALL,AIRFRAME.
What parts can replace AS27641-4?
There are 27 known substitutes for AS27641-4: AS27641, MKP20A, MS27641-10 and 24 more. Substitute compatibility should be verified for your specific system.
Is AS27641-4 still available?
AS27641-4 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