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Technical Data Sheet
PartsTable / COMPONENT / PM21810
PM21810 ✓ 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 BALL,BEARING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 5140 OVERALL, style_designator: BALL, rolling_element_diameter: 0.2500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-007-7626, 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
PM21810
NSN: 3110-01-007-7626
FSC: 3110
CAGE: 77820 — AMPHENOL CORP DIV AMPHENOL AEROSPACE OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL COMP 5140 OVERALL
style_designatorBALL
rolling_element_diameter0.2500 INCHES NOMINAL IN
NSN3110-01-007-7626
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: PM21810 · 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
•
ROLLING ELEMENT DIAMETER: 0.2500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: BALL
•
MATERIAL: STEEL COMP 5140 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
ROLLING ELEMENT DIAMETER0.2500 INCHES NOMINAL IN
STYLE DESIGNATORBALL
MATERIALSTEEL COMP 5140 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
PT109Interchangeable
interchangeable cross-reference
interchangeable
21810Interchangeable
interchangeable cross-reference
interchangeable
845936-2Interchangeable
interchangeable cross-reference
interchangeable
NW21810Interchangeable
interchangeable cross-reference
interchangeable
148313Interchangeable
interchangeable cross-reference
interchangeable
2N5991Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PM21810?
PM21810 is a BALL,BEARING.
What parts can replace PM21810?
There are 10 known substitutes for PM21810: PT109, 21810, 845936-2 and 7 more. Substitute compatibility should be verified for your specific system.
Is PM21810 still available?
PM21810 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026