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AS4139 — INJECTOR ASSEMBLY,FUEL

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS4139: INJECTOR ASSEMBLY,FUEL.

The INJECTOR ASSEMBLY,FUEL is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY OVERALL, leg_length: 1.204 INCHES NOMINAL SECOND END IN, seat_angle: 24.0 DEGREES SECOND END, thread_class: 3A THIRD END A, nominal_width: 0.577 INCHES ALL ENDS IN, connection_type: THREADED EXTERNAL TUBE THIRD END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-583-1044, 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
AS4139
NSN: 4730-01-583-1044
NIINs: 015831044, 017128797, 017227555, 017227558, 017227561, 017227566, 017227571, 017227729, 017227735, 017227809, 017257479, 017257481, 017257594, 017257678, 017276398, 017276400, 017276507, 017279572, 017279607
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
leg_length1.204 INCHES NOMINAL SECOND END IN
seat_angle24.0 DEGREES SECOND END
thread_class3A THIRD END A
nominal_width0.577 INCHES ALL ENDS IN
connection_typeTHREADED EXTERNAL TUBE THIRD END
connection_styleSWIVEL NUT FLARELESS (SWIVEL NUT ATTACHMENT METHOD OPTIONAL)(TUBE) FIRST END
special_featuresITEM IS FAA CERTIFIED
style_designatorTEE
surface_treatmentPHOSPHATE FLUORIDE OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.750 INCHES ALL ENDS IN
NSN4730-01-583-1044
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS4139 · 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
END ITEM IDENTIFICATIONUH-1 4 BLADED ROTOR HEAD UPGRADE
SUBSTITUTES & CROSS-REFERENCES 2
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS4139J040404Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS4139?
AS4139 is a INJECTOR ASSEMBLY,FUEL.
What parts can replace AS4139?
There are 2 known substitutes for AS4139: AS18280, AS4139J040404. Substitute compatibility should be verified for your specific system.
What is the NSN for AS4139?
AS4139 is cataloged in the U.S. Government catalog under NSN 4730-01-583-1044. 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.