PartsTable
Technical Data Sheet
PartsTable / MRO / D203
D203 ✓ Verified by PartsTable
— · 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,FIXED,PAPER DIELECTRIC. Key specifications include material: PLASTIC AND GLASS FIBER AND ALUMINUM, corner_shape: CHAMFERED INSIDE LEFT CORNER, bore_diameter: 1.0625 INCHES NOMINAL IN, overall_width: 30.156 INCHES NOMINAL IN, inclosure_type: ENCASED, load_direction: RADIAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4330, 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→ D203
NSN: 3110-00-142-4330
FSC: 3110
CAGE: 77948 — SINGER CO THE (USA)
SPECIFICATIONS
materialPLASTIC AND GLASS FIBER AND ALUMINUM
corner_shapeCHAMFERED INSIDE LEFT CORNER
bore_diameter1.0625 INCHES NOMINAL IN
overall_width30.156 INCHES NOMINAL IN
inclosure_typeENCASED
load_directionRADIAL
overall_height0.330 INCHES NOMINAL IN
overall_length93.938 INCHES NOMINAL IN
terminal_length1.250 INCHES NOMINAL IN
inner_ring_width0.2810 INCHES NOMINAL IN
keyway_dimension0.1880 INCHES NOMINAL INTERNAL KEYWAY WIDTH IN
outer_ring_width0.2500 INCHES NOMINAL IN
NSN3110-00-142-4330
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: D203 · 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
•
BORE DIAMETER: 1.0625 INCHES NOMINAL IN
•
OUTER RING WIDTH: 0.2500 INCHES NOMINAL IN
•
LOAD DIRECTION: RADIAL
•
INNER RING WIDTH: 0.2810 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
•
OVERALL OUTSIDE DIAMETER: 1.5000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
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 DIAMETER1.0625 INCHES NOMINAL IN
OUTER RING WIDTH0.2500 INCHES NOMINAL IN
LOAD DIRECTIONRADIAL
INNER RING WIDTH0.2810 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
OVERALL OUTSIDE DIAMETER1.5000 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
334979Interchangeable
interchangeable cross-reference
interchangeable
40756Interchangeable
interchangeable cross-reference
interchangeable
18134PInterchangeable
interchangeable cross-reference
interchangeable
B541Interchangeable
interchangeable cross-reference
interchangeable
GA324Interchangeable
interchangeable cross-reference
interchangeable
710080Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D203?
D203 is a CAPACITOR,FIXED,PAPER DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace D203?
There are 23 known substitutes for D203: 334979, 40756, 18134P and 20 more. Substitute compatibility should be verified for your specific system.
Is D203 still available?
D203 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026