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D304821-43 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

D304821-43: BEARING,ROLLER,TAPERED.

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 cup_width: 28.0 MILLIMETERS NOMINAL MM, cone_width: 35.0 MILLIMETERS NOMINAL MM, bore_diameter: 100.0 MILLIMETERS NOMINAL MM, overall_width: 36.0 MILLIMETERS NOMINAL MM, standout_width: 8.0 MILLIMETERS NOMINAL MM, style_designator: STRAIGHT BORE, NORMAL ANGLE. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-259-1633, 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
D304821-43
NSN: 3110-00-259-1633
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 16603 — CONTROL FLOW, INC. DBA WESTECH HEAVY MACHINERY DIVISION DIV WESTECH HEAVY MACHINERY DIVISION (USA)
SPECIFICATIONS
cup_width28.0 MILLIMETERS NOMINAL MM
cone_width35.0 MILLIMETERS NOMINAL MM
bore_diameter100.0 MILLIMETERS NOMINAL MM
overall_width36.0 MILLIMETERS NOMINAL MM
standout_width8.0 MILLIMETERS NOMINAL MM
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius3.0 MILLIMETERS NOMINAL MM
backface_corner_radius0.1000 INCHES NOMINAL IN
overall_outside_diameter155.0 MILLIMETERS NOMINAL MM
retainer_fabrication_methodPRESSED
NSN3110-00-259-1633
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: D304821-43 · 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
•
RETAINER FABRICATION METHOD: PRESSED
•
CUP WIDTH: 28.0 MILLIMETERS NOMINAL MM
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 155.0 MILLIMETERS NOMINAL MM
•
BACKFACE CORNER RADIUS: 0.1000 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 3.0 MILLIMETERS NOMINAL MM
•
STANDOUT WIDTH: 8.0 MILLIMETERS NOMINAL MM
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
RETAINER FABRICATION METHODPRESSED
CUP WIDTH28.0 MILLIMETERS NOMINAL MM
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH36.0 MILLIMETERS NOMINAL MM
OVERALL OUTSIDE DIAMETER155.0 MILLIMETERS NOMINAL MM
BACKFACE CORNER RADIUS0.1000 INCHES NOMINAL IN
CONE CORNER RADIUS3.0 MILLIMETERS NOMINAL MM
STANDOUT WIDTH8.0 MILLIMETERS NOMINAL MM
CONE WIDTH35.0 MILLIMETERS NOMINAL MM
BORE DIAMETER100.0 MILLIMETERS NOMINAL MM
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 6
2D3-978 ITEM 64Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
JM720249JM720210Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
JM20249JM720210Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
DS3225-23Reference document
Same NSN cross-reference
Reference document — Secondary reference
325420587Reference document
Same NSN cross-reference
Reference document — Secondary reference
31345 ITEM 40Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D304821-43?
D304821-43 is a BEARING,ROLLER,TAPERED.
What parts can replace D304821-43?
There are 6 known substitutes for D304821-43: 2D3-978 ITEM 64, JM720249JM720210, JM20249JM720210 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D304821-43?
D304821-43 is cataloged in the U.S. Government catalog under NSN 3110-00-259-1633. 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.