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PartsTable / COMPONENT / AC7918-1
AC7918-1 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL, end_similarity: NOT IDENTICAL, overall_length: 3.406 INCHES NOMINAL IN, first_end_style: CIRCULAR GROOVED, second_end_style: EXTERNAL THREADED, special_features: WEAPON SYSTEM ESSENTIAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-00-898-0144, 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
AC7918-1
NSN: 3040-00-898-0144
FSC: 3040
CAGE: 54370 — ALFA LAVAL INC. (USA)
SPECIFICATIONS
materialSTEEL
step_quantity2
end_similarityNOT IDENTICAL
overall_length3.406 INCHES NOMINAL IN
first_end_styleCIRCULAR GROOVED
second_end_styleEXTERNAL THREADED
special_featuresWEAPON SYSTEM ESSENTIAL
first_end_diameter0.3750 INCHES NOMINAL IN
second_end_diameter0.3910 INCHES NOMINAL IN
largest_step_diameter0.500 INCHES NOMINAL IN
first_end_groove_width0.2810 INCHES NOMINAL IN
end_item_identificationSPRUANCE CLASS DD (963). PURIFIERS. PROPULSION SYSTEMS.
NSN3040-00-898-0144
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT,SHOULDERED TITLE COMPONENT PN AC7918-1 MFR SHAFT,SHOULDERED
KEY FEATURES
•
FIRST END DIAMETER: 0.3750 INCHES NOMINAL IN
•
FIRST END STYLE: CIRCULAR GROOVED
•
SECOND END DIAMETER: 0.3910 INCHES NOMINAL IN
•
FIRST END GROOVE DIAMETER: 0.3440 INCHES NOMINAL IN
•
LARGEST STEP DIAMETER: 0.500 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
FIRST END GROOVE WIDTH: 0.2810 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END DIAMETER0.3750 INCHES NOMINAL IN
FIRST END STYLECIRCULAR GROOVED
SECOND END DIAMETER0.3910 INCHES NOMINAL IN
FIRST END GROOVE DIAMETER0.3440 INCHES NOMINAL IN
LARGEST STEP DIAMETER0.500 INCHES NOMINAL IN
MATERIALSTEEL
CRITICALITY CODE JUSTIFICATIONFEAT
FIRST END GROOVE WIDTH0.2810 INCHES NOMINAL IN
SECOND END EXTERNAL THREAD LENGTH0.438 INCHES NOMINAL IN
END SIMILARITYNOT IDENTICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
3N-280Interchangeable
interchangeable cross-reference
interchangeable
3N-280 PIECE 49Interchangeable
interchangeable cross-reference
interchangeable
AD2522-1Interchangeable
interchangeable cross-reference
interchangeable
3N-280 PIECE 1Interchangeable
interchangeable cross-reference
interchangeable
A-F7-3Interchangeable
interchangeable cross-reference
interchangeable
3N287PC21Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AC7918-1?
AC7918-1 is a SHAFT,SHOULDERED.
What parts can replace AC7918-1?
There are 7 known substitutes for AC7918-1: 3N-280, 3N-280 PIECE 49, AD2522-1 and 4 more. Substitute compatibility should be verified for your specific system.
Is AC7918-1 still available?
AC7918-1 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