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AS5406D03 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS5406D03: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include end_item_identification: FUEL SYSTEM . A109 LUH HELICOPTER, part_name_assigned_by_controlling_agency: NIPPLE,TUBE, SPEC.

AS5406D03. This part is cataloged in the U.S. Government catalog under NSN 4730-01-347-0321, 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
AS5406D03
NSN: 4730-01-347-0321
NIINs: 013470321, 015871940
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
end_item_identificationFUEL SYSTEM . A109 LUH HELICOPTER
part_name_assigned_by_controlling_agencyNIPPLE,TUBE, SPEC. AS5406D03
NSN4730-01-347-0321
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS5406D03 · 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
•
CONNECTION STYLE: FLARED (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.859 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END BULKHEAD
•
STYLE DESIGNATOR: FLARED W/ BULKHEAD THREAD
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.188 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH1.859 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END BULKHEAD
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
STYLE DESIGNATORFLARED W/ BULKHEAD THREAD
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.188 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.375 INCHES FIRST END BULKHEAD IN
SEAT ANGLE37.0 DEGREES ALL ENDS
THREAD CLASS3A FIRST END BULKHEAD A
SUBSTITUTES & CROSS-REFERENCES 6
AS5406Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN832-3DReference document
Same NSN cross-reference
Reference document — Secondary reference
013470321Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS4841Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS4841Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
313030340Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS5406D03?
AS5406D03 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace AS5406D03?
There are 6 known substitutes for AS5406D03: AS5406, AN832-3D, 013470321 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS5406D03?
AS5406D03 is cataloged in the U.S. Government catalog under NSN 4730-01-347-0321. 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.