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Technical Data Sheet
PartsTable / COMPONENT / M203
M203 ✓ 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include color: OLIVE DRAB OVERALL, material: STEEL OVERALL, bore_shape: STRAIGHT, body_length: 0.766 INCHES NOMINAL IN, bore_diameter: 17.00 MILLIMETERS NOMINAL MM, handle_height: 1.594 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 3110-00-183-5815, 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
M203
NSN: 3110-00-183-5815
FSC: 3110
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
colorOLIVE DRAB OVERALL
materialSTEEL OVERALL
bore_shapeSTRAIGHT
body_length0.766 INCHES NOMINAL IN
bore_diameter17.00 MILLIMETERS NOMINAL MM
handle_height1.594 INCHES NOMINAL IN
head_diameter0.750 INCHES NOMINAL IN
overall_width0.750 INCHES NOMINAL IN
terminal_typeWIRE LEAD
load_directionRADIAL
overall_height0.344 INCHES NOMINAL IN
overall_length30.0 INCHES NOMINAL IN
NSN3110-00-183-5815
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M203 · 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
•
LOAD DIRECTION: RADIAL
•
MATERIAL: STEEL INNER RING
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
SURFACE FINISH: GROUND
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.3
•
OVERALL OUTSIDE DIAMETER: 40.00 MILLIMETERS NOMINAL MM
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
LOAD DIRECTIONRADIAL
MATERIALSTEEL INNER RING
MATERIALSTEEL BALL
MATERIALSTEEL OUTER RING
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
SURFACE FINISHGROUND
STANDARD TOLERANCE DESIGNATIONABEC NO.3
OVERALL OUTSIDE DIAMETER40.00 MILLIMETERS NOMINAL MM
BORE DIAMETER17.00 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
25580Interchangeable
interchangeable cross-reference
interchangeable
210008Interchangeable
interchangeable cross-reference
interchangeable
A295Interchangeable
interchangeable cross-reference
interchangeable
M203Interchangeable
interchangeable cross-reference
interchangeable
167986-1Interchangeable
interchangeable cross-reference
interchangeable
M-20.3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M203?
M203 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace M203?
There are 15 known substitutes for M203: 25580, 210008, A295 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M203?
M203 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-183-5815. 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