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A3491 ✓ 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

DRIVE,ENGINE,ELECTRICAL STARTER. Key specifications include overall_length: 4.520 INCHES MINIMUM AND 4.630 INCHES MAXIMUM IN, largest_outside_diameter: 2.060 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2915-00-049-3690, 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
A3491
NSN: 2915-00-049-3690
FSC: 2915
CAGE: 96152 — BORG-WARNER CORP MARVEL-SCHEBLER/TILLOTSON DIV (USA)
SPECIFICATIONS
overall_length4.520 INCHES MINIMUM AND 4.630 INCHES MAXIMUM IN
special_featuresFOR USE ON 0.625 IN. MAX DIA SHAFT,SECURED BY NO. 6 WOODRUFF KEY,10 TOOTH PINION,1.575 IN. OD,1.375 IN. PD,CCW ROTATION 9002A2 IN
largest_outside_diameter2.060 INCHES NOMINAL IN
NSN2915-00-049-3690
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available DRIVE,ENGINE,ELECTRICAL STARTER TITLE COMPONENT PN A3491 MFR DRIVE,ENGINE,ELECTRICA
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: BRASS,0.875 IN. O/A LG,ONE END 0.047 IN. OD,OTHER END 0.301 IN. MIN,0.317 IN. MAX OD IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONBRASS,0.875 IN. O/A LG,ONE END 0.047 IN. OD,OTHER END 0.301 IN. MIN,0.317 IN. MAX OD IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
3550Interchangeable
interchangeable cross-reference
interchangeable
3491Interchangeable
interchangeable cross-reference
interchangeable
3553Interchangeable
interchangeable cross-reference
interchangeable
1958452Interchangeable
interchangeable cross-reference
interchangeable
A3491Interchangeable
interchangeable cross-reference
interchangeable
5199324Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A3491?
A3491 is a DRIVE,ENGINE,ELECTRICAL STARTER.
What parts can replace A3491?
There are 17 known substitutes for A3491: 3550, 3491, 3553 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A3491?
A3491 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2915-00-049-3690. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026