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DF503 — CAPACITOR,FIXED,CERAMIC DIELECTR

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

DF503: CAPACITOR,FIXED,CERAMIC DIELECTR.

CAPACITOR,FIXED,CERAMIC DIELECTR. Key specifications include material: PLASTIC CASE, thickness: 0.187 INCHES NOMINAL IN, body_style: W/O MTG FACILITIES TERMINAL(S) ON ONE SURFACE, body_width: 1.438 INCHES MAXIMUM IN, body_height: 0.219 INCHES MAXIMUM IN, body_length: 1.438 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-353-4593, 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→ DF503
NSN: 5310-00-353-4593
NIINs: 003534593, 006666319, 013687267
FSC: 5310 — Nuts and Washers
CAGE: 50230 — REFINITE PRODUCTS SALES INC (USA)
SPECIFICATIONS
materialPLASTIC CASE
thickness0.187 INCHES NOMINAL IN
body_styleW/O MTG FACILITIES TERMINAL(S) ON ONE SURFACE
body_width1.438 INCHES MAXIMUM IN
body_height0.219 INCHES MAXIMUM IN
body_length1.438 INCHES MAXIMUM IN
hole_diameter0.406 INCHES NOMINAL IN
terminal_length1.500 INCHES MINIMUM IN
overall_diameter3.000 INCHES NOMINAL IN
terminal_diameter0.032 INCHES NOMINAL IN
reliability_indicatorNOT ESTABLISHED
peripheral_shape_styleROUND
NSN5310-00-353-4593
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: DF503 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OVERALL DIAMETER: 3.000 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.406 INCHES NOMINAL IN
•
THICKNESS: 0.187 INCHES NOMINAL IN
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
OVERALL DIAMETER3.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL CORROSION RESISTING OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.406 INCHES NOMINAL IN
THICKNESS0.187 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
P19811Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is DF503?
DF503 is a CAPACITOR,FIXED,CERAMIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace DF503?
There is 1 known substitute for DF503: P19811. Substitute compatibility should be verified for your specific system.
What is the NSN for DF503?
DF503 is cataloged in the U.S. Government catalog under NSN 5310-00-353-4593. 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.