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C121820 — BEARING UNIT,PLAIN

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

C121820: BEARING UNIT,PLAIN.

The BEARING UNIT,PLAIN is a the manufacturer industrial component. Key specifications include material: PLASTIC ENCLOSURE, overall_width: 0.505 INCHES MAXIMUM IN, overall_height: 0.135 INCHES MAXIMUM IN, overall_length: 0.645 INCHES NOMINAL IN, mounting_method: UNTHREADED HOLE(S), special_features: JUNCTION PATTERN ARRANGEMENT: PNP. This part is cataloged in the U.S.

Government catalog under NSN 3130-00-333-3777, 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
C121820
NSN: 3130-00-333-3777
FSC: 3130 — Bearings, Mounted
CAGE: 53591 — SCHWITZER ENGINE COMPONENTS A HOUSEHOLD INTL CO (USA)
SPECIFICATIONS
materialPLASTIC ENCLOSURE
overall_width0.505 INCHES MAXIMUM IN
overall_height0.135 INCHES MAXIMUM IN
overall_length0.645 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S)
special_featuresJUNCTION PATTERN ARRANGEMENT: PNP
internal_configurationJUNCTION CONTACT
semiconductor_materialSILICON
mounting_facility_quantity1
terminal_type_and_quantity3 PIN
power_rating_per_characteristic90.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
current_rating_per_characteristic6.00 AMPERES MAXIMUM BASE CURRENT, DC AND 10.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
NSN3130-00-333-3777
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: C121820 · 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
5F2161Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C121820?
C121820 is a BEARING UNIT,PLAIN.
What parts can replace C121820?
There is 1 known substitute for C121820: 5F2161. Substitute compatibility should be verified for your specific system.
What is the NSN for C121820?
C121820 is cataloged in the U.S. Government catalog under NSN 3130-00-333-3777. 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.