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64A98C278-4 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

64A98C278-4: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER, flange_width: 0.0910 INCHES MINIMUM AND 0.0960 INCHES MAXIMUM IN, overall_length: 0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, body_inside_diameter: 0.3770 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-809-6710, 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
64A98C278-4
NSN: 3120-00-809-6710
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
corner_shapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
flange_width0.0910 INCHES MINIMUM AND 0.0960 INCHES MAXIMUM IN
overall_length0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.3770 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN
body_outside_diameter0.5020 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
flange_outside_diameter0.7450 INCHES MINIMUM AND 0.7550 INCHES MAXIMUM IN
NSN3120-00-809-6710
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 64A98C278-4 · 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
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
•
FLANGE OUTSIDE DIAMETER: 0.7450 INCHES MINIMUM AND 0.7550 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.5020 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
FLANGE OUTSIDE DIAMETER0.7450 INCHES MINIMUM AND 0.7550 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.5020 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
OVERALL LENGTH0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
F519-2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FF519-2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 64A98C278-4?
64A98C278-4 is a BEARING,SLEEVE.
What parts can replace 64A98C278-4?
There are 2 known substitutes for 64A98C278-4: F519-2, FF519-2. Substitute compatibility should be verified for your specific system.
What is the NSN for 64A98C278-4?
64A98C278-4 is cataloged in the U.S. Government catalog under NSN 3120-00-809-6710. 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.