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Technical Data Sheet
PartsTable / COMPONENT / 18440/70490T-3
18440/70490T-3 ✓ Verified by PartsTable
— · WIRE CABLE
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 18440/70490T-3 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-080-0872, 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
18440/70490T-3
NSN: 6145-01-080-0872
FSC: 6145
CAGE: 29365 — ASTRO INDUSTRIES INC (USA)
SPECIFICATIONS
Part Number18440/70490T-3
NSN6145-01-080-0872
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: 18440/70490T-3 · 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
•
CONDUCTOR FORM: STRANDED ALL CONDUCTORS
•
MATERIAL: SILVER SECOND POSITION SHIELD BRAID METALLIC CABLE
•
ROUND CONDUCTOR SIZE: 18 AWG ALL CONDUCTORS
•
CONDUCTOR ARRANGEMENT AND QUANTITY: 3 SINGLES
•
COLOR: WHITE FIRST POSITION JACKET CABLE
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B298 ASSN STD SINGLE TREATMENT RESPONSE CORE CONDUCTOR ALL CONDUCTORS
TECHNICAL CHARACTERISTICS (FLIS)
CONDUCTOR FORMSTRANDED ALL CONDUCTORS
MATERIALSILVER SECOND POSITION SHIELD BRAID METALLIC CABLE
MATERIALCOPPER FIRST POSITION SHIELD BRAID METALLIC CABLE
ROUND CONDUCTOR SIZE18 AWG ALL CONDUCTORS
CONDUCTOR ARRANGEMENT AND QUANTITY3 SINGLES
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE SECOND POSITION JACKET CABLE
COLORWHITE FIRST POSITION JACKET CABLE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B298 ASSN STD SINGLE TREATMENT RESPONSE CORE CONDUCTOR ALL CONDUCTORS
PRECIOUS MATERIALSILVER
PRECIOUS MATERIAL AND LOCATIONSURFACE ALL CONDUCTORS SILVER AND SURFACE SHIELD,BRAID SILVER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 34
5M1005-18R1S6Upgraded Successor
successor cross-reference
successor
ST8060-18Upgraded Successor
successor cross-reference
successor
MIL-W-16878/4Upgraded Successor
successor cross-reference
successor
5793665 FIND 32Upgraded Successor
successor cross-reference
successor
MIL-C-55021/2Upgraded Successor
successor cross-reference
successor
E22C2-1UUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18440/70490T-3?
18440/70490T-3 is a 18440/70490T-3.
What parts can replace 18440/70490T-3?
There are 34 known substitutes for 18440/70490T-3: 5M1005-18R1S6, ST8060-18, MIL-W-16878/4 and 31 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18440/70490T-3?
18440/70490T-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-080-0872. 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