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NA397-394D — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

NA397-394D: 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: 1.8125 INCHES NOMINAL IN, bore_diameter: 2.3622 INCHES NOMINAL IN, overall_width: 2.0625 INCHES NOMINAL IN, standout_width: 0.1250 INCHES NOMINAL IN, special_features: OIL HOLE AND GROOVE IN CUP. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-120-1608, 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
NA397-394D
NSN: 3110-00-120-1608
NIINs: 001201608, 001931066
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.8125 INCHES NOMINAL IN
bore_diameter2.3622 INCHES NOMINAL IN
overall_width2.0625 INCHES NOMINAL IN
standout_width0.1250 INCHES NOMINAL IN
special_featuresOIL HOLE AND GROOVE IN CUP
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.0310 INCHES NOMINAL IN
overall_outside_diameter4.3307 INCHES NOMINAL IN
criticality_code_justificationZZZY
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-120-1608
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: NA397-394D · 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
•
CUP WIDTH: 1.8125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
•
OVERALL OUTSIDE DIAMETER: 4.3307 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0310 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.1250 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
CUP WIDTH1.8125 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
OVERALL WIDTH2.0625 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER4.3307 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0310 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.1250 INCHES NOMINAL IN
SPECIAL FEATURESOIL HOLE AND GROOVE IN CUP
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER2.3622 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
D447Reference 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 NA397-394D?
NA397-394D is a BEARING,ROLLER,TAPERED.
What parts can replace NA397-394D?
There is 1 known substitute for NA397-394D: D447. Substitute compatibility should be verified for your specific system.
What is the NSN for NA397-394D?
NA397-394D is cataloged in the U.S. Government catalog under NSN 3110-00-120-1608. 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.