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1251-243 — SHAFT,SHOULDERED

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

1251-243: SHAFT,SHOULDERED.

The SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, end_similarity: NOT IDENTICAL, overall_length: 76.875 INCHES NOMINAL IN, surface_finish: 32.0 MICROINCHES, first_end_style: UNTHREADED CROSS DRILLED, second_end_style: FLAT KEYWAYS AND INTERNALLY THREADED. This part is cataloged in the U.S.

Government catalog under NSN 3040-01-100-4945, 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
1251-243
NSN: 3040-01-100-4945
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 98042 — MARINETTE MARINE CORPORATION DBA MARINETTE MARINE CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
step_quantity4
end_similarityNOT IDENTICAL
overall_length76.875 INCHES NOMINAL IN
surface_finish32.0 MICROINCHES
first_end_styleUNTHREADED CROSS DRILLED
second_end_styleFLAT KEYWAYS AND INTERNALLY THREADED
special_features0.375 IN. DIA CROSSED DRILLED HOLE FOR TAPERED PIN ON 2ND END LOCATED 2.500 IN. FROM CENTER OF HOLE TO END IN
first_end_diameter1.2500 INCHES NOMINAL IN
second_end_diameter2.0000 INCHES NOMINAL IN
largest_step_diameter2.000 INCHES NOMINAL IN
external_keyway_length5.000 INCHES NOMINAL SECOND END IN
NSN3040-01-100-4945
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT,SHOULDERED TITLE COMPONENT PN 1251-243 MFR SHAFT,SHOULDERED
KEY FEATURES
•
SURFACE FINISH: 32.0 MICROINCHES
•
STEP QUANTITY: 4
•
FIRST END DIAMETER: 1.2500 INCHES NOMINAL IN
•
SECOND END DIAMETER: 2.0000 INCHES NOMINAL IN
•
LARGEST STEP DIAMETER: 2.000 INCHES NOMINAL IN
•
FIRST END STYLE: UNTHREADED CROSS DRILLED
•
SECOND END KEYWAY WIDTH: 5.0000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES
STEP QUANTITY4
FIRST END DIAMETER1.2500 INCHES NOMINAL IN
SECOND END DIAMETER2.0000 INCHES NOMINAL IN
LARGEST STEP DIAMETER2.000 INCHES NOMINAL IN
FIRST END STYLEUNTHREADED CROSS DRILLED
SECOND END KEYWAY WIDTH5.0000 INCHES NOMINAL IN
OVERALL LENGTH76.875 INCHES NOMINAL IN
SECOND END KEYWAY DEPTH2.500 INCHES NOMINAL IN
END SIMILARITYNOT IDENTICAL
SUBSTITUTES & CROSS-REFERENCES 2
5347219 ITEM 3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5347219Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 1251-243?
1251-243 is a SHAFT,SHOULDERED.
What parts can replace 1251-243?
There are 2 known substitutes for 1251-243: 5347219 ITEM 3, 5347219. Substitute compatibility should be verified for your specific system.
What is the NSN for 1251-243?
1251-243 is cataloged in the U.S. Government catalog under NSN 3040-01-100-4945. 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.