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12289946 — SHAFT,SHOULDERED

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

12289946: SHAFT,SHOULDERED.

The SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140, end_similarity: NOT IDENTICAL, overall_length: 4.190 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES, first_end_style: EXTERNAL THREADED, second_end_style: EXTERNAL THREADED. This part is cataloged in the U.S.

Government catalog under NSN 3040-01-138-6930, 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
12289946
NSN: 3040-01-138-6930
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 4140
step_quantity4
end_similarityNOT IDENTICAL
overall_length4.190 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES
first_end_styleEXTERNAL THREADED
second_end_styleEXTERNAL THREADED
special_featuresFIRST END THDS 0.3750-16UNC-2A; SECOND END THDS 0.325-24UNF-2A A
first_end_diameter0.3250 INCHES NOMINAL IN
second_end_diameter0.3750 INCHES NOMINAL IN
largest_step_diameter0.780 INCHES NOMINAL IN
first_end_external_thread_length0.562 INCHES NOMINAL IN
NSN3040-01-138-6930
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT,SHOULDERED TITLE COMPONENT PN 12289946 MFR SHAFT,SHOULDERED
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES
•
SECOND END EXTERNAL THREAD LENGTH: 0.625 INCHES NOMINAL IN
•
STEP QUANTITY: 4
•
FIRST END DIAMETER: 0.3250 INCHES NOMINAL IN
•
SECOND END DIAMETER: 0.3750 INCHES NOMINAL IN
•
LARGEST STEP DIAMETER: 0.780 INCHES NOMINAL IN
•
FIRST END EXTERNAL THREAD LENGTH: 0.562 INCHES NOMINAL IN
•
FIRST END STYLE: EXTERNAL THREADED
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES
SECOND END EXTERNAL THREAD LENGTH0.625 INCHES NOMINAL IN
STEP QUANTITY4
FIRST END DIAMETER0.3250 INCHES NOMINAL IN
SECOND END DIAMETER0.3750 INCHES NOMINAL IN
LARGEST STEP DIAMETER0.780 INCHES NOMINAL IN
FIRST END EXTERNAL THREAD LENGTH0.562 INCHES NOMINAL IN
FIRST END STYLEEXTERNAL THREADED
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD ALL MATERIAL RESPONSES OR ASTM A331 ASSN STD ALL MATERIAL RESPONSES
OVERALL LENGTH4.190 INCHES NOMINAL IN
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 12289946?
12289946 is a SHAFT,SHOULDERED.
What is the NSN for 12289946?
12289946 is cataloged in the U.S. Government catalog under NSN 3040-01-138-6930. 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.