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Technical Data Sheet

4A/ AND 6 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

4A/ AND 6: 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 material: STEEL OVERALL, cup_width: 0.3750 INCHES NOMINAL IN, cone_width: 0.5000 INCHES NOMINAL IN, bore_diameter: 0.7500 INCHES MINIMUM AND 0.7505 INCHES MAXIMUM IN, overall_width: 0.5000 INCHES NOMINAL IN, standout_width: 0.1250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-348-8521, 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
4A/ AND 6
NSN: 3110-00-348-8521
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.3750 INCHES NOMINAL IN
cone_width0.5000 INCHES NOMINAL IN
bore_diameter0.7500 INCHES MINIMUM AND 0.7505 INCHES MAXIMUM IN
overall_width0.5000 INCHES NOMINAL IN
standout_width0.1250 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0620 INCHES NOMINAL IN
lubrication_materialGREASE
backface_corner_radius0.0620 INCHES NOMINAL IN
end_item_identificationTICONDEROGA CLASS CG (47); SPRUANCE CLASS DD (963); GUN FIRE CONTROL SYSTEM, MK 86
overall_outside_diameter1.7500 INCHES MINIMUM AND 1.7510 INCHES MAXIMUM IN
NSN3110-00-348-8521
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 4A/ AND 6 · 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: STAMPED
•
LUBRICATION MATERIAL: GREASE
•
CUP WIDTH: 0.3750 INCHES NOMINAL IN
•
CRITICALITY CODE JUSTIFICATION: ABXV AND ADGA
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 1.7500 INCHES MINIMUM AND 1.7510 INCHES MAXIMUM IN
•
BACKFACE CORNER RADIUS: 0.0620 INCHES NOMINAL IN
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 METHODSTAMPED
LUBRICATION MATERIALGREASE
CUP WIDTH0.3750 INCHES NOMINAL IN
CRITICALITY CODE JUSTIFICATIONABXV AND ADGA
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH0.5000 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER1.7500 INCHES MINIMUM AND 1.7510 INCHES MAXIMUM IN
BACKFACE CORNER RADIUS0.0620 INCHES NOMINAL IN
CONE CORNER RADIUS0.0620 INCHES NOMINAL IN
STANDOUT WIDTH0.1250 INCHES NOMINAL IN
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 2
2994937Reference document
Same NSN cross-reference
Reference document — Secondary reference
8726814Reference 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 4A/ AND 6?
4A/ AND 6 is a BEARING,ROLLER,TAPERED.
What parts can replace 4A/ AND 6?
There are 2 known substitutes for 4A/ AND 6: 2994937, 8726814. Substitute compatibility should be verified for your specific system.
What is the NSN for 4A/ AND 6?
4A/ AND 6 is cataloged in the U.S. Government catalog under NSN 3110-00-348-8521. 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.