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B493531 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

B493531: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include corner_shape: SQUARE ALL CORNERS, flange_width: 0.0450 INCHES MINIMUM AND 0.0500 INCHES MAXIMUM IN, overall_length: 0.9000 INCHES NOMINAL IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, body_inside_diameter: 0.3125 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN, body_outside_diameter: 0.3741 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-166-4551, 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
B493531
NSN: 3120-01-166-4551
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: K0378 — ROLLS-ROYCE PLC DIV DEFENSE (EUROPE) (GBR)
SPECIFICATIONS
corner_shapeSQUARE ALL CORNERS
flange_width0.0450 INCHES MINIMUM AND 0.0500 INCHES MAXIMUM IN
overall_length0.9000 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.3125 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN
body_outside_diameter0.3741 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
flange_outside_diameter0.5800 INCHES NOMINAL IN
NSN3120-01-166-4551
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: B493531 · 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 ALL CORNERS
•
FLANGE OUTSIDE DIAMETER: 0.5800 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.3741 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, EXTERNAL FLANGE ONE END
•
BODY INSIDE DIAMETER: 0.3125 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN
•
FLANGE WIDTH: 0.0450 INCHES MINIMUM AND 0.0500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
FLANGE OUTSIDE DIAMETER0.5800 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.3741 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
OVERALL LENGTH0.9000 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.3125 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN
FLANGE WIDTH0.0450 INCHES MINIMUM AND 0.0500 INCHES MAXIMUM IN
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 B493531?
B493531 is a BUSHING,SLEEVE.
What is the NSN for B493531?
B493531 is cataloged in the U.S. Government catalog under NSN 3120-01-166-4551. 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.