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Technical Data Sheet
PartsTable / MRO / A-A1257
A-A1257 ✓ 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 A-A1257 is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: SQUARE ALL CORNERS, overall_length: 0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.7520 INCHES MINIMUM AND 0.7530 INCHES MAXIMUM IN, body_outside_diameter: 1.2520 INCHES MINIMUM AND 1.2530 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 6145-00-112-1449, 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→ A-A1257
NSN: 6145-00-112-1449
FSC: 6145
CAGE: 68999 — TIMES MICROWAVE SYSTEMS, INC DBA TIMES MICROWAVE SYSTEMS INC DIV TIMES MICROWAVE SYSTEMS (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
corner_shapeSQUARE ALL CORNERS
overall_length0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.7520 INCHES MINIMUM AND 0.7530 INCHES MAXIMUM IN
body_outside_diameter1.2520 INCHES MINIMUM AND 1.2530 INCHES MAXIMUM IN
nondefinitive_spec/std_data1 TYPE AND A COMPOSITION
material_document_and_classificationMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN6145-00-112-1449
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: A-A1257 · 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
•
ROUND CONDUCTOR SIZE: 13 AWG SINGLE CONDUCTOR
•
MATERIAL: COPPER CORE CONDUCTOR SINGLE CONDUCTOR
•
NOMINAL CAPACITANCE IN PICOFARADS: 29.5 PER FOOT
•
CONDUCTOR ARRANGEMENT AND QUANTITY: 1 TRIAXIAL
•
STRAND AWG SIZE PER CONDUCTOR: 21 SINGLE CONDUCTOR
•
VOLTAGE RATING: 4000.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
•
STRAND QUANTITY PER CONDUCTOR: 7 SINGLE CONDUCTOR
TECHNICAL CHARACTERISTICS (FLIS)
ROUND CONDUCTOR SIZE13 AWG SINGLE CONDUCTOR
MATERIALCOPPER CORE CONDUCTOR SINGLE CONDUCTOR
NOMINAL CAPACITANCE IN PICOFARADS29.5 PER FOOT
CONDUCTOR ARRANGEMENT AND QUANTITY1 TRIAXIAL
STRAND AWG SIZE PER CONDUCTOR21 SINGLE CONDUCTOR
VOLTAGE RATING4000.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
STRAND QUANTITY PER CONDUCTOR7 SINGLE CONDUCTOR
MATERIALPLASTIC POLYVINYL CHLORIDE (PVC) THIRD POSITION JACKET CABLE
MATERIALCOPPER SECOND POSITION SHIELD BRAID METALLIC CABLE
CROSS SECTION OUTSIDE DIAMETER0.490 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
21583Interchangeable
interchangeable cross-reference
interchangeable
AA-1257Interchangeable
interchangeable cross-reference
interchangeable
P79-8Interchangeable
interchangeable cross-reference
interchangeable
PB2440-16Interchangeable
interchangeable cross-reference
interchangeable
20232Interchangeable
interchangeable cross-reference
interchangeable
2385995Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-A1257?
A-A1257 is a A-A1257. It is classified as a MRO (MRO_GENERAL).
What parts can replace A-A1257?
There are 8 known substitutes for A-A1257: 21583, AA-1257, P79-8 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-A1257?
A-A1257 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-00-112-1449. 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