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ATSB18-4001 — BEARING,PLAIN,SPHERICAL

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

ATSB18-4001: BEARING,PLAIN,SPHERICAL.

The BEARING,PLAIN,SPHERICAL is a the manufacturer industrial component. Key specifications include style_designator: SEGMENTED, end_item_identification: BEARINGS,PLAIN,UNMOUNTED, part_name_assigned_by_controlling_agency: BEARING,PLAIN,SPHERICAL. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-677-8445, 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
ATSB18-4001
NSN: 3120-01-677-8445
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 15860 — NEW HAMPSHIRE BALL BEARINGS INC DIV ASTRO DIVISION (USA)
SPECIFICATIONS
style_designatorSEGMENTED
end_item_identificationBEARINGS,PLAIN,UNMOUNTED
part_name_assigned_by_controlling_agencyBEARING,PLAIN,SPHERICAL
NSN3120-01-677-8445
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: ATSB18-4001 · 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
•
STYLE DESIGNATOR: SEGMENTED
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSEGMENTED
PART NAME ASSIGNED BY CONTROLLING AGENCYBEARING,PLAIN,SPHERICAL
END ITEM IDENTIFICATIONBEARINGS,PLAIN,UNMOUNTED
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ATSB18-4001?
ATSB18-4001 is a BEARING,PLAIN,SPHERICAL.
What is the NSN for ATSB18-4001?
ATSB18-4001 is cataloged in the U.S. Government catalog under NSN 3120-01-677-8445. 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.