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40555A — BEARING HALF,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

40555A: BEARING HALF,SLEEVE.

The BEARING HALF,SLEEVE is a the manufacturer industrial component. Key specifications include body_inside_diameter: 2.5156 INCHES NOMINAL IN, flange_outside_diameter: 3.5000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-362-9030, 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
40555A
NSN: 3120-00-362-9030
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
body_inside_diameter2.5156 INCHES NOMINAL IN
flange_outside_diameter3.5000 INCHES NOMINAL IN
NSN3120-00-362-9030
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 40555A · 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
•
FLANGE OUTSIDE DIAMETER: 3.5000 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 2.5156 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE OUTSIDE DIAMETER3.5000 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.5156 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
42540AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 40555A?
40555A is a BEARING HALF,SLEEVE.
What parts can replace 40555A?
There is 1 known substitute for 40555A: 42540A. Substitute compatibility should be verified for your specific system.
What is the NSN for 40555A?
40555A is cataloged in the U.S. Government catalog under NSN 3120-00-362-9030. 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.