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KMB20S-N-51 — BEARING,PLAIN,SELF-ALIGNING

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

KMB20S-N-51: BEARING,PLAIN,SELF-ALIGNING.

The BEARING,PLAIN,SELF-ALIGNING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 3120-01-446-5239, 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
KMB20S-N-51
NSN: 3120-01-446-5239
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 97613 — SARGENT AEROSPACE & DEFENSE, LLC DBA KAHR BEARINGS (USA)
SPECIFICATIONS
Part NumberKMB20S-N-51
NSN3120-01-446-5239
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: KMB20S-N-51 · 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
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 6
P26110S-NReference document
Same NSN cross-reference
Reference document — Secondary reference
VTB09880S-NReference document
Same NSN cross-reference
Reference document — Secondary reference
4D0037-20S-NSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BSG20S-NReference document
Same NSN cross-reference
Reference document — Secondary reference
BSSR-20-2245S-NReference document
Same NSN cross-reference
Reference document — Secondary reference
AMB-20-1037S-NReference 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 KMB20S-N-51?
KMB20S-N-51 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace KMB20S-N-51?
There are 6 known substitutes for KMB20S-N-51: P26110S-N, VTB09880S-N, 4D0037-20S-N and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KMB20S-N-51?
KMB20S-N-51 is cataloged in the U.S. Government catalog under NSN 3120-01-446-5239. 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.