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PartsTable / COMPONENT / AS81934
AS81934 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The CONE,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: ALUMINUM ALLOY 2024 OUTER LAYER, corner_shape: SQUARE OUTSIDE LEFT CORNER, flange_width: 0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN, overall_length: 0.3287 INCHES MINIMUM AND 0.3437 INCHES MAXIMUM IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, surface_treatment: ANODIZE OR CHROMATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-006-4815, 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
AS81934
NSN: 3120-00-006-4815
FSC: 3120
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OUTER LAYER
corner_shapeSQUARE OUTSIDE LEFT CORNER
flange_width0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
overall_length0.3287 INCHES MINIMUM AND 0.3437 INCHES MAXIMUM IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentANODIZE OR CHROMATE OVERALL
body_inside_diameter0.5630 INCHES MINIMUM AND 0.5640 INCHES MAXIMUM IN
body_outside_diameter0.6887 INCHES MINIMUM AND 0.6892 INCHES MAXIMUM IN
end_item_identificationASTOR RADAR
flange_outside_diameter1.1050 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-200/3 T8511 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6 T851 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER
surface_treatment_document_and_classificationMIL-A-8625 T1 IR T2 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
NSN3120-00-006-4815
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: AS81934 · 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
•
FLANGE OUTSIDE DIAMETER: 1.4800 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 0.7505 INCHES MINIMUM AND 0.7515 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.9388 INCHES MINIMUM AND 0.9393 INCHES MAXIMUM IN
•
FLANGE WIDTH: 0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
•
SURFACE FINISH: 125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF FLANGE
•
CORNER SHAPE: SQUARE INSIDE LEFT CORNER
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE OUTSIDE DIAMETER1.4800 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.7505 INCHES MINIMUM AND 0.7515 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.9388 INCHES MINIMUM AND 0.9393 INCHES MAXIMUM IN
FLANGE WIDTH0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
SURFACE FINISH125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF FLANGE
CORNER SHAPESQUARE INSIDE LEFT CORNER
CORNER SHAPEUNDERCUT LEFT FLANGE BODY CORNER
SURFACE FINISH125.0 MICROINCHES RIGHT END SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MS21241-12C016Interchangeable
Same NIIN cross-reference
interchangeable
103-2012-016Interchangeable
Same NIIN cross-reference
interchangeable
ATLF12SS16Interchangeable
Same NIIN cross-reference
interchangeable
KDJ12C016-241Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS81934?
AS81934 is a CONE,TAPERED ROLLER BEARING.
What parts can replace AS81934?
There are 4 known substitutes for AS81934: MS21241-12C016, 103-2012-016, ATLF12SS16 and 1 more. Substitute compatibility should be verified for your specific system.
Is AS81934 still available?
AS81934 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026