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PartsTable / COMPONENT / 409-50003-20
409-50003-20 ✓ 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 FLANGE,PIPE is a the manufacturer industrial component. Key specifications include special_features: MEASUREMENTS: 18.000 IN. LG.; 9.000 IN.

LG. OF IT. 3,FACE TO FACE IN, surface_treatment: PRIMER, end_item_identification: AIRCRAFT MODEL E-6A A, surface_treatment_document_and_classification: BMS10-11K TYPE I MIL SPEC 1ST TREATMENT RESPONSE AND BMS10-11K TYPE II FED SPEC 2ND TREATMENT RESPONSE.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-362-2988, 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
409-50003-20
NSN: 4730-01-362-2988
FSC: 4730
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
special_featuresMEASUREMENTS: 18.000 IN. LG.; 9.000 IN. LG. OF IT. 3,FACE TO FACE IN
surface_treatmentPRIMER
end_item_identificationAIRCRAFT MODEL E-6A A
surface_treatment_document_and_classificationBMS10-11K TYPE I MIL SPEC 1ST TREATMENT RESPONSE AND BMS10-11K TYPE II FED SPEC 2ND TREATMENT RESPONSE
NSN4730-01-362-2988
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 409-50003-20 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: BMS10-11K TYPE I MIL SPEC 1ST TREATMENT RESPONSE AND BMS10-11K TYPE II FED SPEC 2ND TREATMENT RESPONSE
•
SURFACE TREATMENT: PRIMER
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONBMS10-11K TYPE I MIL SPEC 1ST TREATMENT RESPONSE AND BMS10-11K TYPE II FED SPEC 2ND TREATMENT RESPONSE
SURFACE TREATMENTPRIMER
END ITEM IDENTIFICATIONAIRCRAFT MODEL E-6A A
SPECIAL FEATURESMEASUREMENTS: 18.000 IN. LG.; 9.000 IN. LG. OF IT. 3,FACE TO FACE IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
1HJE45-MInterchangeable
interchangeable cross-reference
interchangeable
88-13300Interchangeable
interchangeable cross-reference
interchangeable
50411Interchangeable
interchangeable cross-reference
interchangeable
2153HXInterchangeable
interchangeable cross-reference
interchangeable
33719Interchangeable
interchangeable cross-reference
interchangeable
12759-01278Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 409-50003-20?
409-50003-20 is a FLANGE,PIPE.
What parts can replace 409-50003-20?
There are 6 known substitutes for 409-50003-20: 1HJE45-M, 88-13300, 50411 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 409-50003-20?
409-50003-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-362-2988. 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