PartsTable
Technical Data Sheet
PartsTable / MRO / 03981
03981 ✓ Verified by PartsTable
Jumbo · MRO · MRO_GENERAL
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

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: STEEL CORROSION RESISTING OVERALL, bore_shape: STRAIGHT, flange_width: 0.0420 INCHES NOMINAL IN, bore_diameter: 0.1875 INCHES NOMINAL IN, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-293-8392, 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
MRO→ MRO_GENERAL→ 03981
NSN: 3110-00-293-8392
FSC: 3110
CAGE: 43991 — FAG BEARINGS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
bore_shapeSTRAIGHT
flange_width0.0420 INCHES NOMINAL IN
bore_diameter0.1875 INCHES NOMINAL IN
load_directionRADIAL
surface_finishGROUND
inner_ring_width0.2180 INCHES NOMINAL IN
outer_ring_taper0.0800 PER FOOT IN INCHES NOMINAL
outer_ring_width0.1950 INCHES NOMINAL IN
special_featuresAXIAL INTERNAL FIT-UP TOLERANCE UNDER 1 LB LOAD LBS
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
flange_outside_diameter0.6300 INCHES NOMINAL IN
NSN3110-00-293-8392
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 03981 · Jumbo ⚠ 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
•
BORE DIAMETER: 0.1875 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
LOAD DIRECTION: RADIAL
•
RETAINER FABRICATION METHOD: PRESSED
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.1
•
BORE SHAPE: STRAIGHT
•
OUTER RING TAPER: 0.0800 PER FOOT IN INCHES NOMINAL
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.1875 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
LOAD DIRECTIONRADIAL
RETAINER FABRICATION METHODPRESSED
STANDARD TOLERANCE DESIGNATIONABEC NO.1
SPECIAL FEATURESAXIAL INTERNAL FIT-UP TOLERANCE UNDER 1 LB LOAD LBS
BORE SHAPESTRAIGHT
OUTER RING TAPER0.0800 PER FOOT IN INCHES NOMINAL
SURFACE FINISHGROUND
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
4310Interchangeable
interchangeable cross-reference
interchangeable
123-39Interchangeable
interchangeable cross-reference
interchangeable
254-102Interchangeable
interchangeable cross-reference
interchangeable
3981Interchangeable
interchangeable cross-reference
interchangeable
BT3981Interchangeable
interchangeable cross-reference
interchangeable
9230Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 03981?
03981 is a CAPACITOR,VARIABLE,AIR DIELECTRI manufactured by Jumbo. It is classified as a MRO (MRO_GENERAL).
What parts can replace 03981?
There are 17 known substitutes for 03981: 4310, 123-39, 254-102 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 03981?
03981 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-293-8392. 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