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1AH78 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
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PRODUCT OVERVIEW

The EXTENSION,SOCKET WRENCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_length: 17.0 INCHES MINIMUM AND 18.1 INCHES MAXIMUM IN, drive_end_shape: SQUARE SECOND END EXTERNAL, outside_diameter: 0.500 INCHES NOMINAL IN, style_designator: RIGID, features_provided: MANUAL TOOL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-273-9205, 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
1AH78
NSN: 5120-00-273-9205
FSC: 5120
CAGE: 25795 — W.W. GRAINGER, INC. DIV GOVERNMENT SALES DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length17.0 INCHES MINIMUM AND 18.1 INCHES MAXIMUM IN
drive_end_shapeSQUARE SECOND END EXTERNAL
outside_diameter0.500 INCHES NOMINAL IN
style_designatorRIGID
features_providedMANUAL TOOL
surface_treatmentCHROMIUM OVERALL
drive_surface_size0.375 INCHES NOMINAL BOTH ENDS IN
nondefinitive_spec/std_data2 TYPE AND 2 CLASS
specification/standard_data0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5120-00-273-9205
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available EXTENSION,SOCKET WRENCH TITLE COMPONENT PN 1AH78 MFR EXTENSION,SOCKET WRENC
KEY FEATURES
•
SPECIFICATION/STANDARD DATA: 0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
FEATURES PROVIDED: MANUAL TOOL
•
SURFACE TREATMENT: CHROMIUM OVERALL
•
DRIVE SURFACE SIZE: 0.375 INCHES NOMINAL BOTH ENDS IN
•
STYLE DESIGNATOR: RIGID
•
DRIVE END SHAPE: SQUARE FIRST END INTERNAL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SPECIFICATION/STANDARD DATA0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
FEATURES PROVIDEDMANUAL TOOL
SURFACE TREATMENTCHROMIUM OVERALL
DRIVE SURFACE SIZE0.375 INCHES NOMINAL BOTH ENDS IN
STYLE DESIGNATORRIGID
DRIVE END SHAPESQUARE FIRST END INTERNAL
DRIVE END SHAPESQUARE SECOND END EXTERNAL
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 2 CLASS
OVERALL LENGTH17.0 INCHES MINIMUM AND 18.1 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
JHWS-115PInterchangeable
interchangeable cross-reference
interchangeable
10424470Interchangeable
interchangeable cross-reference
interchangeable
J5463Interchangeable
interchangeable cross-reference
interchangeable
AS4283Interchangeable
interchangeable cross-reference
interchangeable
10424474Interchangeable
interchangeable cross-reference
interchangeable
6416Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1AH78?
1AH78 is a EXTENSION,SOCKET WRENCH.
What parts can replace 1AH78?
There are 28 known substitutes for 1AH78: JHWS-115P, 10424470, J5463 and 25 more. Substitute compatibility should be verified for your specific system.
Is 1AH78 still available?
1AH78 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026