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787AS257 — SHAFT,SHOULDERED

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

787AS257: SHAFT,SHOULDERED.

The SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130, end_similarity: IDENTICAL, overall_length: 18.940 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES, first_end_style: EXTERNAL THREADED, first_end_external_thread_length: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3040-01-266-7192, 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
787AS257
NSN: 3040-01-266-7192
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 4130
step_quantity2
end_similarityIDENTICAL
overall_length18.940 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES
first_end_styleEXTERNAL THREADED
first_end_external_thread_length1.000 INCHES NOMINAL IN
NSN3040-01-266-7192
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT,SHOULDERED TITLE COMPONENT PN 787AS257 MFR SHAFT,SHOULDERED
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES
•
STEP QUANTITY: 2
•
FIRST END EXTERNAL THREAD LENGTH: 1.000 INCHES NOMINAL IN
•
FIRST END STYLE: EXTERNAL THREADED
•
END SIMILARITY: IDENTICAL
•
MATERIAL: STEEL COMP 4130
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES
STEP QUANTITY2
FIRST END EXTERNAL THREAD LENGTH1.000 INCHES NOMINAL IN
FIRST END STYLEEXTERNAL THREADED
OVERALL LENGTH18.940 INCHES NOMINAL IN
END SIMILARITYIDENTICAL
MATERIALSTEEL COMP 4130
OTHER ITEMS IN FSC 3040 — Miscellaneous Power Transmission Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3040-00-001-0046 3040-00-001-0047 3040-00-001-0048 3040-00-001-0068 3040-00-001-0077 3040-00-001-0078 3040-00-001-0089 3040-00-001-1224
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 787AS257?
787AS257 is a SHAFT,SHOULDERED.
What is the NSN for 787AS257?
787AS257 is cataloged in the U.S. Government catalog under NSN 3040-01-266-7192. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.