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Technical Data Sheet
PartsTable / COMPONENT / MF4DD
MF4DD ✓ 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,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, flange_width: 0.0420 INCHES NOMINAL IN, bore_diameter: 0.2500 INCHES MINIMUM AND 0.2503 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-293-8362, 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
MF4DD
NSN: 3110-00-293-8362
FSC: 3110
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
flange_width0.0420 INCHES NOMINAL IN
bore_diameter0.2500 INCHES MINIMUM AND 0.2503 INCHES MAXIMUM IN
load_directionRADIAL
surface_finishGROUND
inner_ring_width0.2480 INCHES MINIMUM IN
outer_ring_width0.2260 INCHES NOMINAL IN
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
internal_clearance0.0010 INCHES MAXIMUM RADIAL IN
flange_outside_diameter0.6875 INCHES NOMINAL IN
outer_ring_outside_diameter0.6253 INCHES MINIMUM AND 0.6257 INCHES MAXIMUM IN
NSN3110-00-293-8362
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MF4DD · 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 DIAMETER: 0.2500 INCHES NOMINAL IN
•
OUTER RING WIDTH: 0.2260 INCHES NOMINAL IN
•
LUBRICATION MATERIAL: GREASE
•
INNER RING WIDTH: 0.2500 INCHES NOMINAL IN
•
SHIELD QUANTITY: 2
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
LOAD DIRECTION: RADIAL
•
FLANGE OUTSIDE DIAMETER: 0.6875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.2500 INCHES NOMINAL IN
OUTER RING WIDTH0.2260 INCHES NOMINAL IN
LUBRICATION MATERIALGREASE
INNER RING WIDTH0.2500 INCHES NOMINAL IN
SHIELD QUANTITY2
INTERNAL FIT-UP DESIGNATIONSTANDARD
LOAD DIRECTIONRADIAL
FLANGE OUTSIDE DIAMETER0.6875 INCHES NOMINAL IN
BORE SHAPESTRAIGHT
RETAINER FABRICATION METHODPRESSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
558216Interchangeable
interchangeable cross-reference
interchangeable
MF4DDInterchangeable
interchangeable cross-reference
interchangeable
MF4DDE9426Interchangeable
interchangeable cross-reference
interchangeable
SMB287076-7Interchangeable
Same NIIN cross-reference
interchangeable
MF4DDFS160Interchangeable
Same NIIN cross-reference
interchangeable
RS77NR4HXR3MILG3278Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MF4DD?
MF4DD is a BEARING,BALL,ANNULAR.
What parts can replace MF4DD?
There are 7 known substitutes for MF4DD: 558216, MF4DD, MF4DDE9426 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MF4DD?
MF4DD is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-293-8362. 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