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491-30 ✓ 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 ARRESTER,SPARK EXHAUST is a the manufacturer industrial component. Key specifications include thickness: 0.19 INCHES NOMINAL IN, hole_diameter: 0.66 INCHES NOMINAL IN, overall_diameter: 3.12 INCHES NOMINAL IN, peripheral_shape_style: ROUND, end_item_identification: 1740-01-575-5662, MT3 TRACTOR, cross-sectional_shape_style: RECTANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-230-2686, 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
491-30
NSN: 2990-00-230-2686
FSC: 2990
CAGE: 15360 — WALKER MFG CO (USA)
SPECIFICATIONS
thickness0.19 INCHES NOMINAL IN
hole_diameter0.66 INCHES NOMINAL IN
overall_diameter3.12 INCHES NOMINAL IN
peripheral_shape_styleROUND
end_item_identification1740-01-575-5662, MT3 TRACTOR
cross-sectional_shape_styleRECTANGULAR
part_name_assigned_by_controlling_agencyWASHER, F, FW, 0.66ID, 3.12OD, .19THK, MOD
NSN2990-00-230-2686
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ARRESTER,SPARK EXHAUST TITLE COMPONENT PN 491-30 MFR ARRESTER,SPARK EXHAUST
KEY FEATURES
•
DESIGN FORM: PREBENT
•
USAGE LOCATION: EXHAUST PIPE
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN FORMPREBENT
USAGE LOCATIONEXHAUST PIPE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
49130-AInterchangeable
interchangeable cross-reference
interchangeable
T-49130Interchangeable
interchangeable cross-reference
interchangeable
ABT49130Interchangeable
interchangeable cross-reference
interchangeable
A20791/001Interchangeable
interchangeable cross-reference
interchangeable
A20791AInterchangeable
interchangeable cross-reference
interchangeable
491-30Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 491-30?
491-30 is a ARRESTER,SPARK EXHAUST.
What parts can replace 491-30?
There are 15 known substitutes for 491-30: 49130-A, T-49130, ABT49130 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 491-30?
491-30 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-230-2686. 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