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521828 — 521828

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

521828: 521828.

The 521828 is a the manufacturer industrial component. Key specifications include overall_width: 2.656 INCHES NOMINAL IN, overall_length: 4.594 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-347-5843, 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
MRO→ MRO_GENERAL→ 521828
NSN: 3120-00-347-5843
NIINs: 003475843, 009499463, 010136440
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 02978 — RENK AMERICA LLC DIV RENK AMERICA (USA)
SPECIFICATIONS
overall_width2.656 INCHES NOMINAL IN
overall_length4.594 INCHES NOMINAL IN
NSN3120-00-347-5843
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 521828 · 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
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
•
CORNER SHAPE: CHAMFERED INSIDE LEFT CORNER
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH32.0 MICROINCHES LEFT END SURFACE OF BODY
SURFACE FINISH32.0 MICROINCHES RIGHT END SURFACE OF BODY
SURFACE FINISH32.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
CORNER SHAPECHAMFERED INSIDE LEFT CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPECHAMFERED INSIDE RIGHT CORNER
BODY OUTSIDE DIAMETER2.0020 INCHES MINIMUM AND 2.0030 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 521828?
521828 is a 521828. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 521828?
521828 is cataloged in the U.S. Government catalog under NSN 3120-00-347-5843. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.