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Technical Data Sheet
PartsTable / COMPONENT / 41491-0000
41491-0000 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The CIRCUIT CARD ASSEMBLY is a the manufacturer industrial component. Key specifications include end_item_identification: 1040-00-450-6559. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-229-8985, 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
41491-0000
NSN: 4730-00-229-8985
FSC: 4730
CAGE: 66042 — THOMAS C. WILSON, INC. DBA THOMAS C WILSON (USA)
SPECIFICATIONS
end_item_identification1040-00-450-6559
NSN4730-00-229-8985
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 41491-0000 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATION1040-00-450-6559
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
NFES 0577Interchangeable
Shirt,fireman's
interchangeable
NFES 000577Interchangeable
Shirt,fireman's
interchangeable
5100-91Interchangeable
Shirt,fireman's
interchangeable
NFES 0578Interchangeable
Shirt,fireman's
interchangeable
NFES 0000578Interchangeable
Shirt,fireman's
interchangeable
NFES 000579Interchangeable
Shirt,fireman's
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 41491-0000?
41491-0000 is a CIRCUIT CARD ASSEMBLY.
What parts can replace 41491-0000?
There are 21 known substitutes for 41491-0000: NFES 0577, NFES 000577, 5100-91 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 41491-0000?
41491-0000 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-229-8985. 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