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Technical Data Sheet
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KD391MX2 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

KD391MX2: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 3120-00-830-0342, 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
KD391MX2
NSN: 3120-00-830-0342
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 17454 — TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR (USA)
SPECIFICATIONS
Part NumberKD391MX2
NSN3120-00-830-0342
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: KD391MX2 · 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
SUBSTITUTES & CROSS-REFERENCES 1
391-0502Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 KD391MX2?
KD391MX2 is a BEARING,SLEEVE.
What parts can replace KD391MX2?
There is 1 known substitute for KD391MX2: 391-0502. Substitute compatibility should be verified for your specific system.
What is the NSN for KD391MX2?
KD391MX2 is cataloged in the U.S. Government catalog under NSN 3120-00-830-0342. This indicates validated use in U.S. government and defense supply chains.
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