PartsTable
Technical Data Sheet

491-5445-00/1 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

491-5445-00/1: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include special_features: WEAPON SYSTEM ESSENTIAL, end_item_identification: ARLEIGH BURKE CLASS DDG, criticality_code_justification: FEAT. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-108-7374, 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
491-5445-00/1
NSN: 4730-01-108-7374
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 58568 — ENVIROVAC INC DBA MONOGRAM SYSTEMS-ROCKFORD DIV (USA)
SPECIFICATIONS
special_featuresWEAPON SYSTEM ESSENTIAL
end_item_identificationARLEIGH BURKE CLASS DDG
criticality_code_justificationFEAT
NSN4730-01-108-7374
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 491-5445-00/1 · 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
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: FEAT
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONFEAT
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
END ITEM IDENTIFICATIONARLEIGH BURKE CLASS DDG
SUBSTITUTES & CROSS-REFERENCES 2
2503026Reference document
Same NSN cross-reference
Reference document — Secondary reference
5544500Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 491-5445-00/1?
491-5445-00/1 is a RESTRICTOR,FLUID FLOW.
What parts can replace 491-5445-00/1?
There are 2 known substitutes for 491-5445-00/1: 2503026, 5544500. Substitute compatibility should be verified for your specific system.
What is the NSN for 491-5445-00/1?
491-5445-00/1 is cataloged in the U.S. Government catalog under NSN 4730-01-108-7374. 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.