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PartsTable / COMPONENT / KP12AFS428
KP12AFS428 ✓ 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 TETRAFLUOROETHYLENE SEAL, bore_diameter: 0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN, load_direction: RADIAL, inner_ring_width: 0.4320 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN, outer_ring_width: 0.3700 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN, style_designator: SINGLE ROW INNER RING EXTENDED BOTH SIDES. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-037-1256, 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
KP12AFS428
NSN: 3110-01-037-1256
FSC: 3110
CAGE: 06144 — INDUSTRIAL TECTONICS BEARINGS CORPORATION DBA RBC BEARINGS INC DIV INDUSTRIAL TECTONICS BEARINGS (USA)
SPECIFICATIONS
materialPLASTIC TETRAFLUOROETHYLENE SEAL
bore_diameter0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
seal_quantity2
load_directionRADIAL
inner_ring_width0.4320 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN
outer_ring_width0.3700 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
style_designatorSINGLE ROW INNER RING EXTENDED BOTH SIDES
bearing_seal_typeCONTACT
surface_treatmentCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
lubrication_materialGREASE
overall_outside_diameter1.6245 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE BALL
NSN3110-01-037-1256
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: KP12AFS428 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE OUTER RING
•
MATERIAL: STEEL COMP E52100 OUTER RING
•
SURFACE TREATMENT: CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
•
OVERALL OUTSIDE DIAMETER: 1.6245 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE OUTER RING
MATERIALSTEEL COMP E52100 OUTER RING
MATERIALPLASTIC TETRAFLUOROETHYLENE SEAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE BALL
MATERIALSTEEL COMP E52100 BALL
MATERIALSTEEL COMP E52100 INNER RING
SURFACE TREATMENTCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
OVERALL OUTSIDE DIAMETER1.6245 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN
LOAD DIRECTIONRADIAL
OUTER RING WIDTH0.3700 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
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
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KP12AFS428?
KP12AFS428 is a BEARING,BALL,AIRFRAME.
What parts can replace KP12AFS428?
There are 27 known substitutes for KP12AFS428: AS27641, MKP20A, MS27641-10 and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KP12AFS428?
KP12AFS428 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-037-1256. 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