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Technical Data Sheet
PartsTable / COMPONENT / M8121X0H
M8121X0H ✓ 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: STEEL OVERALL, bore_diameter: 0.5000 INCHES NOMINAL IN, overall_width: 0.7500 INCHES NOMINAL IN, alignment_type: RIGID, surface_finish: GROUND, special_features: CLOSED END,EXTRA CAPACITY OUTER RACE,OIL HOLE IN OUTER RACE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-902-1672, 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
M8121X0H
NSN: 3110-00-902-1672
FSC: 3110
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.5000 INCHES NOMINAL IN
overall_width0.7500 INCHES NOMINAL IN
alignment_typeRIGID
surface_finishGROUND
special_featuresCLOSED END,EXTRA CAPACITY OUTER RACE,OIL HOLE IN OUTER RACE
style_designatorNON-SEPARABLE, CLOSED END, DRAWN SHELL
overall_outside_diameter0.6875 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3110-00-902-1672
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M8121X0H · 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: 0.5000 INCHES NOMINAL IN
•
ALIGNMENT TYPE: RIGID
•
SURFACE FINISH: GROUND
•
RETAINER FABRICATION METHOD: PRESSED
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
•
STYLE DESIGNATOR: NON-SEPARABLE, CLOSED END, DRAWN SHELL
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.5000 INCHES NOMINAL IN
OVERALL WIDTH0.7500 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
SPECIAL FEATURESCLOSED END,EXTRA CAPACITY OUTER RACE,OIL HOLE IN OUTER RACE
SURFACE FINISHGROUND
RETAINER FABRICATION METHODPRESSED
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
STYLE DESIGNATORNON-SEPARABLE, CLOSED END, DRAWN SHELL
MATERIALSTEEL OVERALL
OVERALL OUTSIDE DIAMETER0.6875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
709481Interchangeable
interchangeable cross-reference
interchangeable
M8121XInterchangeable
interchangeable cross-reference
interchangeable
173520Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M8121X0H?
M8121X0H is a BEARING,ROLLER,NEEDLE.
What parts can replace M8121X0H?
There are 3 known substitutes for M8121X0H: 709481, M8121X, 173520. Substitute compatibility should be verified for your specific system.
What is the NSN for M8121X0H?
M8121X0H is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-902-1672. 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