PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 1A21-443
1A21-443 ✓ 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 BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include color: GREEN, material: STEEL CORROSION RESISTING, physical_form: LIQUID, overall_diameter: 0.250 INCHES NOMINAL IN, end_item_identification: VALVE, GLOBE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-354-6406, 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
1A21-443
NSN: 3120-00-354-6406
FSC: 3120
CAGE: 23382 — FWD SEAGRAVE HOLDINGS LP (USA)
SPECIFICATIONS
colorGREEN
materialSTEEL CORROSION RESISTING
physical_formLIQUID
overall_diameter0.250 INCHES NOMINAL IN
end_item_identificationVALVE, GLOBE
NSN3120-00-354-6406
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 1A21-443 · 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 18
HE273-0033-0001Interchangeable
interchangeable cross-reference
interchangeable
21443Interchangeable
interchangeable cross-reference
interchangeable
X18220Interchangeable
interchangeable cross-reference
interchangeable
218443Interchangeable
interchangeable cross-reference
interchangeable
54A50E45Interchangeable
interchangeable cross-reference
interchangeable
7088714Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1A21-443?
1A21-443 is a BEARING,SLEEVE.
What parts can replace 1A21-443?
There are 18 known substitutes for 1A21-443: HE273-0033-0001, 21443, X18220 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1A21-443?
1A21-443 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-354-6406. 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