PartsTable
Technical Data Sheet
KP258S ✓ 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: STEEL INNER RING, bore_diameter: 1.5625 INCHES NOMINAL IN, alignment_type: SELF-ALIGNING, load_direction: RADIAL, inner_ring_width: 0.4375 INCHES NOMINAL IN, outer_ring_width: 0.3750 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 3110-00-227-2600, 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
KP258S
NSN: 3110-00-227-2600
FSC: 3110
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialSTEEL INNER RING
bore_diameter1.5625 INCHES NOMINAL IN
seal_quantity2
alignment_typeSELF-ALIGNING
load_directionRADIAL
inner_ring_width0.4375 INCHES NOMINAL IN
outer_ring_width0.3750 INCHES NOMINAL IN
style_designatorSINGLE ROW, EXTERNAL SELF ALIGNING, W/ALIGNING RING
bearing_seal_typeCONTACT
features_providedALIGNING RING
surface_treatmentCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
lubrication_materialGREASE
NSN3110-00-227-2600
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: KP258S · 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
ALIGNMENT TYPE: SELF-ALIGNING
BEARING SEAL TYPE: CONTACT
OUTER RING WIDTH: 0.3750 INCHES NOMINAL IN
SEAL QUANTITY: 2
LUBRICATION MATERIAL: GREASE
INNER RING WIDTH: 0.4375 INCHES NOMINAL IN
FEATURES PROVIDED: ALIGNING RING
LOAD DIRECTION: RADIAL
TECHNICAL CHARACTERISTICS (FLIS)
ALIGNMENT TYPESELF-ALIGNING
BEARING SEAL TYPECONTACT
OUTER RING WIDTH0.3750 INCHES NOMINAL IN
SEAL QUANTITY2
LUBRICATION MATERIALGREASE
INNER RING WIDTH0.4375 INCHES NOMINAL IN
FEATURES PROVIDEDALIGNING RING
LOAD DIRECTIONRADIAL
SELF-ALIGNMENT LOCATIONEXTERNAL
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
251531Interchangeable
interchangeable cross-reference
interchangeable
KP25BSInterchangeable
interchangeable cross-reference
interchangeable
AS27648-25GInterchangeable
Same NIIN cross-reference
interchangeable
MS27648-25GInterchangeable
Same NIIN cross-reference
interchangeable
KP25BSFS428Interchangeable
Same NIIN cross-reference
interchangeable
STSKB211-25Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KP258S?
KP258S is a BEARING,BALL,AIRFRAME.
What parts can replace KP258S?
There are 9 known substitutes for KP258S: 251531, KP25BS, AS27648-25G and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KP258S?
KP258S is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-227-2600. This indicates validated use in U.S. government and defense supply chains.
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