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NA385-384D — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

NA385-384D: 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: 1.6875 INCHES NOMINAL IN, bore_diameter: 2.1654 INCHES NOMINAL IN, overall_width: 2.0625 INCHES NOMINAL IN, standout_width: 0.1875 INCHES NOMINAL IN, special_features: OPERATING TEMPERATURE NOT TO EXCEED 121 DEG C/250 DEG F; OIL HOLE AND GROVE IN CUP DEGC. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-120-1607, 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
NA385-384D
NSN: 3110-00-120-1607
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.6875 INCHES NOMINAL IN
bore_diameter2.1654 INCHES NOMINAL IN
overall_width2.0625 INCHES NOMINAL IN
standout_width0.1875 INCHES NOMINAL IN
special_featuresOPERATING TEMPERATURE NOT TO EXCEED 121 DEG C/250 DEG F; OIL HOLE AND GROVE IN CUP DEGC
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_diameter3.9370 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 4
NSN3110-00-120-1607
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: NA385-384D · 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: 1.6875 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
•
OVERALL OUTSIDE DIAMETER: 3.9370 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0310 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.1875 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 WIDTH1.6875 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES, NON-ADJUSTABLE
OVERALL WIDTH2.0625 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.9370 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0310 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.1875 INCHES NOMINAL IN
SPECIAL FEATURESOPERATING TEMPERATURE NOT TO EXCEED 121 DEG C/250 DEG F; OIL HOLE AND GROVE IN CUP DEGC
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 4
BORE DIAMETER2.1654 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
31782Reference document
Same NSN cross-reference
Reference document — Secondary reference
F5857Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS19088-25Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NA385-384D?
NA385-384D is a BEARING,ROLLER,TAPERED.
What parts can replace NA385-384D?
There are 3 known substitutes for NA385-384D: 31782, F5857, MS19088-25. Substitute compatibility should be verified for your specific system.
What is the NSN for NA385-384D?
NA385-384D is cataloged in the U.S. Government catalog under NSN 3110-00-120-1607. This indicates validated use in U.S. government and defense supply chains.
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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.