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AS5791 — ADAPTER,STRAIGHT,TUBE TO GAS FIT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS5791: ADAPTER,STRAIGHT,TUBE TO GAS FIT.

ADAPTER,STRAIGHT,TUBE TO GAS FIT. Key specifications include material: TITANIUM ALLOY OVERALL, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE CENTER BULKHEAD, connection_style: FLARELESS (TUBE) ALL ENDS, nominal_thread_size: 0.4375 INCHES ALL ENDS IN, end_item_identification: KC-46A AIRCRAFT A. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-724-9560, 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
AS5791
NSN: 4730-01-724-9560
NIINs: 017249560, 017249564
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE CENTER BULKHEAD
connection_styleFLARELESS (TUBE) ALL ENDS
nominal_thread_size0.4375 INCHES ALL ENDS IN
end_item_identificationKC-46A AIRCRAFT A
nominal_outside_diameter0.25 INCHES ALL ENDS IN
thread_quantity_per_inch20 ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
material_document_and_classificationAMS4965 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyFITTING ASSEMBLY, STRAIGHT, BULKHEAD FLARELESS
nominal_outside_diameter_tube_accommodated0.25 INCHES ALL ENDS IN
NSN4730-01-724-9560
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS5791 · 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: FLARELESS (TUBE) ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE CENTER BULKHEAD
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS4965 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.25 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.4375 INCHES ALL ENDS IN
•
NOMINAL OUTSIDE DIAMETER: 0.25 INCHES ALL ENDS IN
•
THREAD CLASS: 3A ALL ENDS A
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE CENTER BULKHEAD
MATERIAL DOCUMENT AND CLASSIFICATIONAMS4965 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.25 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.4375 INCHES ALL ENDS IN
NOMINAL OUTSIDE DIAMETER0.25 INCHES ALL ENDS IN
PART NAME ASSIGNED BY CONTROLLING AGENCYFITTING ASSEMBLY, STRAIGHT, BULKHEAD FLARELESS
THREAD CLASS3A ALL ENDS A
END ITEM IDENTIFICATIONKC-46A AIRCRAFT A
THREAD QUANTITY PER INCH20 ALL ENDS
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS5791?
AS5791 is a ADAPTER,STRAIGHT,TUBE TO GAS FIT.
What is the NSN for AS5791?
AS5791 is cataloged in the U.S. Government catalog under NSN 4730-01-724-9560. 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.