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K4320 — CUP,TAPERED ROLLER BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

K4320: CUP,TAPERED ROLLER BEARING.

The CUP,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: STEEL OVERALL, overall_width: 1.3125 INCHES NOMINAL IN, outside_diameter: 3.4843 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, backface_corner_radius: 0.1250 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA CLASS 2. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-0383, 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
K4320
NSN: 3110-00-100-0383
NIINs: 001000383, 011695516
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: F0272 — SKF FRANCE (FRA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width1.3125 INCHES NOMINAL IN
outside_diameter3.4843 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
backface_corner_radius0.1250 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-0383
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: K4320 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
STYLE DESIGNATOR: NORMAL ANGLE
•
OUTSIDE DIAMETER: 3.4843 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
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
STYLE DESIGNATORNORMAL ANGLE
OVERALL WIDTH1.3125 INCHES NOMINAL IN
OUTSIDE DIAMETER3.4843 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
4320Reference document
Same NSN cross-reference
Reference document — Secondary reference
1A5021Reference document
Same NSN cross-reference
Reference document — Secondary reference
534760Reference document
Same NSN cross-reference
Reference document — Secondary reference
120071Reference document
Same NSN cross-reference
Reference document — Secondary reference
706776Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2D147Reference 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 K4320?
K4320 is a CUP,TAPERED ROLLER BEARING.
What parts can replace K4320?
There are 6 known substitutes for K4320: 4320, 1A5021, 534760 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K4320?
K4320 is cataloged in the U.S. Government catalog under NSN 3110-00-100-0383. 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.