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AS1655A40 — COUPLING BODY,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS1655A40: COUPLING BODY,TUBE.

The COUPLING BODY,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY, overall_length: 1.091 INCHES MAXIMUM IN, outside_diameter: 3.080 INCHES MAXIMUM IN, style_designator: FLEXIBLE COUPLING BODY, surface_treatment: ANODIZE, end_item_identification: AIR COND, AIR CYCLE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-733-4648, 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
AS1655A40
NSN: 4730-01-733-4648
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
overall_length1.091 INCHES MAXIMUM IN
outside_diameter3.080 INCHES MAXIMUM IN
style_designatorFLEXIBLE COUPLING BODY
surface_treatmentANODIZE
end_item_identificationAIR COND, AIR CYCLE
material_document_and_classificationQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyCOUPLING BODY, THREADLESS-FLEXIBLE, FIXED CAVITY, SELF-BONDING
tube_outside_diameter_for_which_designed2.500 INCHES NOMINAL IN
surface_treatment_document_and_classificationAMS 2472, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE
NSN4730-01-733-4648
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS1655A40 · 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
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SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2472, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 2.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLEXIBLE COUPLING BODY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 3.080 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2472, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED2.500 INCHES NOMINAL IN
STYLE DESIGNATORFLEXIBLE COUPLING BODY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL LENGTH1.091 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.080 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE
PART NAME ASSIGNED BY CONTROLLING AGENCYCOUPLING BODY, THREADLESS-FLEXIBLE, FIXED CAVITY, SELF-BONDING
END ITEM IDENTIFICATIONAIR COND, AIR CYCLE
MATERIALALUMINUM ALLOY
SUBSTITUTES & CROSS-REFERENCES 1
AS1655Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS1655A40?
AS1655A40 is a COUPLING BODY,TUBE.
What parts can replace AS1655A40?
There is 1 known substitute for AS1655A40: AS1655. Substitute compatibility should be verified for your specific system.
What is the NSN for AS1655A40?
AS1655A40 is cataloged in the U.S. Government catalog under NSN 4730-01-733-4648. 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.