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8491A664 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

8491A664: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_length: 0.7500 INCHES NOMINAL IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.3750 INCHES NOMINAL IN, body_outside_diameter: 0.5000 INCHES NOMINAL IN, end_item_identification: MODULE SUPPORT TYPE 1 AN/AQS-20A 53711 8224100 A. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-559-9105, 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
8491A664
NSN: 3120-01-559-9105
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 52369 — UNITED DRILL BUSHING CORPORATION DBA UNITED DRILL BUSHING CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length0.7500 INCHES NOMINAL IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.3750 INCHES NOMINAL IN
body_outside_diameter0.5000 INCHES NOMINAL IN
end_item_identificationMODULE SUPPORT TYPE 1 AN/AQS-20A 53711 8224100 A
NSN3120-01-559-9105
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 8491A664 · 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
•
BODY OUTSIDE DIAMETER: 0.5000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 0.3750 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
BODY OUTSIDE DIAMETER0.5000 INCHES NOMINAL IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH0.7500 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.3750 INCHES NOMINAL IN
END ITEM IDENTIFICATIONMODULE SUPPORT TYPE 1 AN/AQS-20A 53711 8224100 A
MATERIALSTEEL OVERALL
OTHER ITEMS IN FSC 3120 — Bearings, Plain, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3120-00-001-1288 3120-00-001-1835 3120-00-001-1838 3120-00-001-1928 3120-00-001-1934 3120-00-001-3933 3120-00-001-3937 3120-00-001-3938
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 8491A664?
8491A664 is a BUSHING,SLEEVE.
What is the NSN for 8491A664?
8491A664 is cataloged in the U.S. Government catalog under NSN 3120-01-559-9105. 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.