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Technical Data Sheet
PartsTable / COMPONENT / R200B21
R200B21 ✓ 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 BALL, bore_shape: STRAIGHT, bore_diameter: 0.3935 INCHES MINIMUM AND 0.3937 INCHES MAXIMUM IN, overall_width: 0.3493 INCHES MINIMUM AND 0.3543 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 3110-00-183-5822, 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
R200B21
NSN: 3110-00-183-5822
FSC: 3110
CAGE: 03956 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL BALL
bore_shapeSTRAIGHT
bore_diameter0.3935 INCHES MINIMUM AND 0.3937 INCHES MAXIMUM IN
overall_width0.3493 INCHES MINIMUM AND 0.3543 INCHES MAXIMUM IN
load_directionRADIAL
surface_finishGROUND
special_featuresINNER RING ECCENTRICITY 0.0020 IN. MAX ALSO SELECTED,CLASSIFIED AND TESTED BY THE ASSY MFR AT HIS PLANT IN
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
overall_outside_diameter1.1807 INCHES MINIMUM AND 1.1811 INCHES MAXIMUM IN
internal_fit-up_designationSTANDARD
NSN3110-00-183-5822
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: R200B21 · 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: 0.3935 INCHES MINIMUM AND 0.3937 INCHES MAXIMUM IN
•
MATERIAL: STEEL INNER RING
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
BORE SHAPE: STRAIGHT
•
INTERNAL FIT-UP DESIGNATION: STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.3935 INCHES MINIMUM AND 0.3937 INCHES MAXIMUM IN
MATERIALSTEEL INNER RING
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
MATERIALSTEEL OUTER RING
MATERIALSTEEL BALL
BORE SHAPESTRAIGHT
INTERNAL FIT-UP DESIGNATIONSTANDARD
OVERALL WIDTH0.3493 INCHES MINIMUM AND 0.3543 INCHES MAXIMUM IN
SPECIAL FEATURESINNER RING ECCENTRICITY 0.0020 IN. MAX ALSO SELECTED,CLASSIFIED AND TESTED BY THE ASSY MFR AT HIS PLANT IN
SURFACE FINISHGROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
D2690PBInterchangeable
interchangeable cross-reference
interchangeable
50580Interchangeable
interchangeable cross-reference
interchangeable
8851571Interchangeable
interchangeable cross-reference
interchangeable
110886Interchangeable
interchangeable cross-reference
interchangeable
1190442Interchangeable
interchangeable cross-reference
interchangeable
110886H1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R200B21?
R200B21 is a BEARING,BALL,ANNULAR.
What parts can replace R200B21?
There are 15 known substitutes for R200B21: D2690PB, 50580, 8851571 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R200B21?
R200B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-183-5822. 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