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Technical Data Sheet
PartsTable / COMPONENT / 4T-30304A
4T-30304A ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, cup_width: 13.0 MILLIMETERS NOMINAL MM, cone_width: 15.0 MILLIMETERS MAXIMUM MM, bore_diameter: 20.0 MILLIMETERS NOMINAL MM, overall_width: 16.25 MILLIMETERS NOMINAL MM, alignment_type: RIGID. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-195-6626, 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
4T-30304A
NSN: 3110-01-195-6626
FSC: 3110
CAGE: 0LTL1 — NTN BEARING CORPORATION OF AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width13.0 MILLIMETERS NOMINAL MM
cone_width15.0 MILLIMETERS MAXIMUM MM
bore_diameter20.0 MILLIMETERS NOMINAL MM
overall_width16.25 MILLIMETERS NOMINAL MM
alignment_typeRIGID
standout_width3.25 MILLIMETERS NOMINAL MM
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius2.0 MILLIMETERS MAXIMUM MM
backface_corner_radius2.0 MILLIMETERS MAXIMUM MM
overall_outside_diameter52.0 MILLIMETERS MAXIMUM MM
retainer_fabrication_methodPRESSED
NSN3110-01-195-6626
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 4T-30304A · 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
•
CONE CORNER RADIUS: 2.0 MILLIMETERS MAXIMUM MM
•
OVERALL OUTSIDE DIAMETER: 52.0 MILLIMETERS MAXIMUM MM
•
BORE DIAMETER: 20.0 MILLIMETERS NOMINAL MM
•
STANDOUT WIDTH: 3.25 MILLIMETERS NOMINAL MM
•
MATERIAL: STEEL OVERALL
•
CONE WIDTH: 15.0 MILLIMETERS MAXIMUM MM
•
STANDARD TOLERANCE DESIGNATION: INTERNATIONAL STANDARDS ORGANIZATION STANDARD TOLERANCE
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)
CONE CORNER RADIUS2.0 MILLIMETERS MAXIMUM MM
OVERALL OUTSIDE DIAMETER52.0 MILLIMETERS MAXIMUM MM
BORE DIAMETER20.0 MILLIMETERS NOMINAL MM
STANDOUT WIDTH3.25 MILLIMETERS NOMINAL MM
MATERIALSTEEL OVERALL
CONE WIDTH15.0 MILLIMETERS MAXIMUM MM
STANDARD TOLERANCE DESIGNATIONINTERNATIONAL STANDARDS ORGANIZATION STANDARD TOLERANCE
OVERALL WIDTH16.25 MILLIMETERS NOMINAL MM
BACKFACE CORNER RADIUS2.0 MILLIMETERS MAXIMUM MM
RETAINER FABRICATION METHODPRESSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
30304Interchangeable
interchangeable cross-reference
interchangeable
100-2Interchangeable
interchangeable cross-reference
interchangeable
MD115VACSLInterchangeable
interchangeable cross-reference
interchangeable
202A03Interchangeable
interchangeable cross-reference
interchangeable
517Interchangeable
interchangeable cross-reference
interchangeable
118235Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4T-30304A?
4T-30304A is a BEARING,ROLLER,TAPERED.
What parts can replace 4T-30304A?
There are 14 known substitutes for 4T-30304A: 30304, 100-2, MD115VACSL and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4T-30304A?
4T-30304A is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-195-6626. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026