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Technical Data Sheet
PartsTable / MRO / 327C990B18AC999
327C990B18AC999 ✓ 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 327C990B18AC999 is a the manufacturer industrial component. Key specifications include color: WHITE FIRST POSITION COVER SINGLE CONDUCTOR, material: PLASTIC POLYAMIDE NYLON SECOND POSITION JACKET SINGLE CONDUCTOR, temp_rating: -55.0 CELSIUS AND 105.0 CELSIUS DEGC, conductor_form: STRANDED SINGLE CONDUCTOR, voltage_rating: 600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR, special_features: WEAPON SYSTEM ESSENTIAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-00-806-7402, 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→ 327C990B18AC999
NSN: 6145-00-806-7402
FSC: 6145
CAGE: 97942 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
colorWHITE FIRST POSITION COVER SINGLE CONDUCTOR
materialPLASTIC POLYAMIDE NYLON SECOND POSITION JACKET SINGLE CONDUCTOR
temp_rating-55.0 CELSIUS AND 105.0 CELSIUS DEGC
conductor_formSTRANDED SINGLE CONDUCTOR
voltage_rating600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
special_featuresWEAPON SYSTEM ESSENTIAL
surface_treatmentTIN CORE CONDUCTOR SINGLE CONDUCTOR
round_conductor_size18 AWG SINGLE CONDUCTOR
end_item_identificationHELICOPTER, SEA KNIGHT H-46; NUCLEAR POWER PLANTS; AIRCRAFT, EAGLE F-15; TROPOCATTER RADIO TERMIANAL AN/TRC-170; HELICOPTER, SEASPRITE H-2; AIRCRAFT, E-6 TACAMO; 485L TACS; MISSILE, STINGER
cross-sectional_shape_styleROUND
strand_awg_size_per_conductor26 SINGLE CONDUCTOR
strand_quantity_per_conductor7 SINGLE CONDUCTOR
NSN6145-00-806-7402
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: 327C990B18AC999 · 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
•
STRAND QUANTITY PER CONDUCTOR: 7 SINGLE CONDUCTOR
•
TEMP RATING: -55.0 CELSIUS AND 105.0 CELSIUS DEGC
•
VOLTAGE RATING: 600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
•
ROUND CONDUCTOR SIZE: 18 AWG SINGLE CONDUCTOR
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B33 ASSN STD ALL MATERIAL RESPONSES CORE CONDUCTOR SINGLE CONDUCTOR
•
CROSS SECTION OUTSIDE DIAMETER: 0.074 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STRAND QUANTITY PER CONDUCTOR7 SINGLE CONDUCTOR
TEMP RATING-55.0 CELSIUS AND 105.0 CELSIUS DEGC
END ITEM IDENTIFICATIONHELICOPTER, SEA KNIGHT H-46; NUCLEAR POWER PLANTS; AIRCRAFT, EAGLE F-15; TROPOCATTER RADIO TERMIANAL AN/TRC-170; HELICOPTER, SEASPRITE H-2; AIRCRAFT, E-6 TACAMO; 485L TACS; MISSILE, STINGER
VOLTAGE RATING600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
ROUND CONDUCTOR SIZE18 AWG SINGLE CONDUCTOR
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B33 ASSN STD ALL MATERIAL RESPONSES CORE CONDUCTOR SINGLE CONDUCTOR
CROSS SECTION OUTSIDE DIAMETER0.074 INCHES NOMINAL IN
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
COLORWHITE FIRST POSITION COVER SINGLE CONDUCTOR
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B33-63 ASSN STD SINGLE TREATMENT RESPONSE CORE CONDUCTOR SINGLE CONDUCTOR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
MIL-W-16878/17Upgraded Successor
successor cross-reference
successor
3003101Upgraded Successor
successor cross-reference
successor
W11-1-12Upgraded Successor
successor cross-reference
successor
W11/1/12Upgraded Successor
successor cross-reference
successor
M16878/17BLG9Upgraded Successor
successor cross-reference
successor
439-7037-000Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 327C990B18AC999?
327C990B18AC999 is a 327C990B18AC999. It is classified as a MRO (MRO_GENERAL).
What parts can replace 327C990B18AC999?
There are 28 known substitutes for 327C990B18AC999: MIL-W-16878/17, 3003101, W11-1-12 and 25 more. Substitute compatibility should be verified for your specific system.
Is 327C990B18AC999 still available?
327C990B18AC999 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