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AS12891 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

AS12891: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, corner_shape: RELIEF GROOVE ALL CORNERS, overall_length: 0.7360 INCHES NOMINAL IN, style_designator: SEGMENTED, EXTERNAL FLANGES BOTH ENDS, left_flange_width: 0.0980 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN, right_flange_width: 0.0980 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-159-4521, 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
AS12891
NSN: 3120-01-159-4521
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
corner_shapeRELIEF GROOVE ALL CORNERS
overall_length0.7360 INCHES NOMINAL IN
style_designatorSEGMENTED, EXTERNAL FLANGES BOTH ENDS
left_flange_width0.0980 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN
right_flange_width0.0980 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN
body_inside_diameter0.5510 INCHES NOMINAL IN
body_outside_diameter0.7360 INCHES NOMINAL IN
left_flange_outside_diameter0.8150 INCHES NOMINAL IN
right_flange_outside_diameter0.8150 INCHES NOMINAL IN
NSN3120-01-159-4521
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: AS12891 · 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
•
CORNER SHAPE: RELIEF GROOVE ALL CORNERS
•
RIGHT FLANGE WIDTH: 0.0980 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.7360 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SEGMENTED, EXTERNAL FLANGES BOTH ENDS
•
BODY INSIDE DIAMETER: 0.5510 INCHES NOMINAL IN
•
RIGHT FLANGE OUTSIDE DIAMETER: 0.8150 INCHES NOMINAL IN
•
LEFT FLANGE OUTSIDE DIAMETER: 0.8150 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CORNER SHAPERELIEF GROOVE ALL CORNERS
RIGHT FLANGE WIDTH0.0980 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.7360 INCHES NOMINAL IN
STYLE DESIGNATORSEGMENTED, EXTERNAL FLANGES BOTH ENDS
OVERALL LENGTH0.7360 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.5510 INCHES NOMINAL IN
RIGHT FLANGE OUTSIDE DIAMETER0.8150 INCHES NOMINAL IN
LEFT FLANGE OUTSIDE DIAMETER0.8150 INCHES NOMINAL IN
LEFT FLANGE WIDTH0.0980 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN
MATERIALSTEEL CORROSION RESISTING OVERALL
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS12891?
AS12891 is a BEARING,SLEEVE.
What is the NSN for AS12891?
AS12891 is cataloged in the U.S. Government catalog under NSN 3120-01-159-4521. 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.