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Technical Data Sheet
PartsTable / MRO / MILC8603
MILC8603 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CAPACITOR,FIXED,GLASS DIELECTRIC. Key specifications include diameter: 0.204 INCHES NOMINAL IN, material: STEEL COMP 321 OR STEEL COMP 347 CUSHION, overall_width: 0.500 INCHES NOMINAL IN, style_designator: SINGLE LOOP, surface_treatment: PASSIVATE BAND, material_thickness: 0.0285 INCHES MINIMUM AND 0.0355 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-001-4749, 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→ MILC8603
NSN: 5340-00-001-4749
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
diameter0.204 INCHES NOMINAL IN
materialSTEEL COMP 321 OR STEEL COMP 347 CUSHION
overall_width0.500 INCHES NOMINAL IN
style_designatorSINGLE LOOP
surface_treatmentPASSIVATE BAND
material_thickness0.0285 INCHES MINIMUM AND 0.0355 INCHES MAXIMUM IN
loop_inside_diameter1.000 INCHES NOMINAL IN
cushioning_environmental_protectionHEAT
distance_from_loop_center_to_tongue_end1.169 INCHES NOMINAL IN
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BAND
center_to_center_distance_between_loop_and_mounting_hole0.951 INCHES NOMINAL IN
NSN5340-00-001-4749
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MILC8603 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL COMP 321 OR STEEL COMP 347 CUSHION
•
MATERIAL THICKNESS: 0.0285 INCHES MINIMUM AND 0.0355 INCHES MAXIMUM IN
•
DIAMETER: 0.204 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE LOOP
•
CUSHIONING ENVIRONMENTAL PROTECTION: HEAT
•
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE: 0.951 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BAND
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)
MATERIALSTEEL COMP 321 OR STEEL COMP 347 CUSHION
MATERIAL THICKNESS0.0285 INCHES MINIMUM AND 0.0355 INCHES MAXIMUM IN
DIAMETER0.204 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE LOOP
CUSHIONING ENVIRONMENTAL PROTECTIONHEAT
MATERIALSTEEL COMP 321 OR STEEL COMP 348 OVERALL
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE0.951 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BAND
OVERALL WIDTH0.500 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE BAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
MILC8603Upgraded Successor
successor cross-reference
successor
99122Upgraded Successor
successor cross-reference
successor
MS21919G8Upgraded Successor
successor cross-reference
successor
5096D16Upgraded Successor
successor cross-reference
successor
534002989402Upgraded Successor
successor cross-reference
successor
MS21919G11Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILC8603?
MILC8603 is a CAPACITOR,FIXED,GLASS DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace MILC8603?
There are 24 known substitutes for MILC8603: MILC8603, 99122, MS21919G8 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILC8603?
MILC8603 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-001-4749. 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