PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 4210/21
4210/21 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The 4210/21 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-177-3877, 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
4210/21
NSN: 3120-01-177-3877
FSC: 3120
CAGE: U1918 — MISSION SYSTEMS WIMBORNE LIMITED DIV COBHAM MISSION SYSTEMS WIMBORNE LTD (GBR)
SPECIFICATIONS
Part Number4210/21
NSN3120-01-177-3877
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 4210/21 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
73-268157-1Interchangeable
interchangeable cross-reference
interchangeable
4210-021Interchangeable
interchangeable cross-reference
interchangeable
421021Interchangeable
interchangeable cross-reference
interchangeable
DM400560056Interchangeable
interchangeable cross-reference
interchangeable
DC 600AInterchangeable
interchangeable cross-reference
interchangeable
600AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4210/21?
4210/21 is a 4210/21.
What parts can replace 4210/21?
There are 8 known substitutes for 4210/21: 73-268157-1, 4210-021, 421021 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4210/21?
4210/21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-177-3877. 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