PartsTable
Technical Data Sheet
PartsTable / MRO / 977-3
977-3 ✓ 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 BOX CONNECTOR,ELECTRICAL is a the manufacturer industrial component. Key specifications include end_item_identification: B52. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-078-8589, 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→ 977-3
NSN: 6145-01-078-8589
FSC: 6145
CAGE: 16428 — BELDEN WIRE & CABLE COMPANY LLC DBA BELDEN CDT ELECTRONICS DIVISION (USA)
SPECIFICATIONS
end_item_identificationB52
NSN6145-01-078-8589
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: 977-3 · 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 ARRANGEMENT AND QUANTITY: 3 TWISTED PAIR
•
SURFACE TREATMENT: TIN CORE CONDUCTOR ALL CONDUCTORS
•
CONDUCTOR QUANTITY: 6
•
CROSS SECTION OUTSIDE DIAMETER: 0.392 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
ROUND CONDUCTOR SIZE: 18 AWG ALL CONDUCTORS
•
MATERIAL: COPPER CORE CONDUCTOR ALL CONDUCTORS
•
ACCESSORY WIRE TYPE AND QUANTITY: 3 DRAIN
TECHNICAL CHARACTERISTICS (FLIS)
CONDUCTOR ARRANGEMENT AND QUANTITY3 TWISTED PAIR
SURFACE TREATMENTTIN CORE CONDUCTOR ALL CONDUCTORS
CONDUCTOR QUANTITY6
CROSS SECTION OUTSIDE DIAMETER0.392 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEROUND
ROUND CONDUCTOR SIZE18 AWG ALL CONDUCTORS
MATERIALCOPPER CORE CONDUCTOR ALL CONDUCTORS
ACCESSORY WIRE TYPE AND QUANTITY3 DRAIN
CONDUCTOR ARRANGEMENT AND QUANTITY3 TWISTED PAIR
SURFACE TREATMENTTIN CORE CONDUCTOR ALL CONDUCTORS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
12752A-4Interchangeable
interchangeable cross-reference
interchangeable
977-3Interchangeable
interchangeable cross-reference
interchangeable
977Interchangeable
interchangeable cross-reference
interchangeable
007B7070-2Interchangeable
interchangeable cross-reference
interchangeable
CIT 4060Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 977-3?
977-3 is a BOX CONNECTOR,ELECTRICAL. It is classified as a MRO (MRO_GENERAL).
What parts can replace 977-3?
There are 5 known substitutes for 977-3: 12752A-4, 977-3, 977 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 977-3?
977-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-078-8589. 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