PartsTable
Technical Data Sheet
PartsTable / MRO / 555661-20-4
555661-20-4 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Stranded for flexible routing, solid for conduit THHN/THWN dual-rated — check both tables
Ampacity depends on installation method
PRODUCT OVERVIEW

The 555661-20-4 is a the manufacturer industrial component. Key specifications include color: YELLOW CORE CONDUCTOR SINGLE CONDUCTOR, material: PLASTIC POLYTETRAFLUOROETHYLENE FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR, temp_rating: 200.0 CELSIUS DEGC, conductor_form: STRANDED SINGLE CONDUCTOR, voltage_rating: 600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR, precious_material: SILVER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-00-939-1745, 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→ 555661-20-4
NSN: 6145-00-939-1745
FSC: 6145
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
colorYELLOW CORE CONDUCTOR SINGLE CONDUCTOR
materialPLASTIC POLYTETRAFLUOROETHYLENE FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR
temp_rating200.0 CELSIUS DEGC
conductor_formSTRANDED SINGLE CONDUCTOR
voltage_rating600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
precious_materialSILVER
surface_treatmentSILVER CORE CONDUCTOR SINGLE CONDUCTOR
round_conductor_size20 AWG SINGLE CONDUCTOR
cross-sectional_shape_styleROUND
strand_awg_size_per_conductor32 SINGLE CONDUCTOR
strand_quantity_per_conductor19 SINGLE CONDUCTOR
cross_section_outside_diameter0.058 INCHES NOMINAL IN
NSN6145-00-939-1745
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: 555661-20-4 · OEM ⚠ VERIFY BEFORE ORDERING Ampacity depends on installation method — conduit ≠ free air ≠ underground. Same wire, different ratings. AWG sizing is inverse — smaller number = thicker wire (4 AWG > 12 AWG) ✓ BROKER TIP Stranded = flexible routing and vibration resistance. Solid = fixed conduit runs only. THHN/THWN = dual rated — check both dry and wet ampacity tables PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS SECTION OUTSIDE DIAMETER: 0.058 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR
•
PRECIOUS MATERIAL AND LOCATION: SURFACE SINGLE CONDUCTOR SILVER
•
TEMP RATING: 200.0 CELSIUS DEGC
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B298 ASSN STD SINGLE MATERIAL RESPONSE CORE CONDUCTOR SINGLE CONDUCTOR
•
COLOR: YELLOW CORE CONDUCTOR SINGLE CONDUCTOR
•
CONDUCTOR FORM: STRANDED SINGLE CONDUCTOR
TECHNICAL CHARACTERISTICS (FLIS)
CROSS SECTION OUTSIDE DIAMETER0.058 INCHES NOMINAL IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR
PRECIOUS MATERIAL AND LOCATIONSURFACE SINGLE CONDUCTOR SILVER
TEMP RATING200.0 CELSIUS DEGC
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B298 ASSN STD SINGLE MATERIAL RESPONSE CORE CONDUCTOR SINGLE CONDUCTOR
COLORYELLOW CORE CONDUCTOR SINGLE CONDUCTOR
MATERIALCOPPER ALLOY CORE CONDUCTOR SINGLE CONDUCTOR
CONDUCTOR FORMSTRANDED SINGLE CONDUCTOR
ROUND CONDUCTOR SIZE20 AWG SINGLE CONDUCTOR
STRAND QUANTITY PER CONDUCTOR19 SINGLE CONDUCTOR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
MIL-W-22759/11Upgraded Successor
successor cross-reference
successor
75911-24-902Upgraded Successor
successor cross-reference
successor
M22759/11-24-902Upgraded Successor
successor cross-reference
successor
75911-20-914Upgraded Successor
successor cross-reference
successor
MSS759/11-20-914Upgraded Successor
successor cross-reference
successor
SAE AS22759/11Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 555661-20-4?
555661-20-4 is a 555661-20-4. It is classified as a MRO (MRO_GENERAL).
What parts can replace 555661-20-4?
There are 28 known substitutes for 555661-20-4: MIL-W-22759/11, 75911-24-902, M22759/11-24-902 and 25 more. Substitute compatibility should be verified for your specific system.
Is 555661-20-4 still available?
555661-20-4 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