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AA1590-11 — ORIFICE RESTRICTOR,GAS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AA1590-11: ORIFICE RESTRICTOR,GAS.

The ORIFICE RESTRICTOR,GAS is a the manufacturer industrial component. Key specifications include criticality_code_justification: TEXT. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-270-4103, 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
AA1590-11
NSN: 4730-01-270-4103
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 06581 — ALLAN AIRCRAFT SUPPLY CO., LLC DBA ALLAN AIRCRAFT SUPPLY (USA)
SPECIFICATIONS
criticality_code_justificationTEXT
NSN4730-01-270-4103
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AA1590-11 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: 79K80240-11; STAINLESS STEEL,300 SERIES; BULKHEAD UNION; BULKHEAD FLARED TUBE SIZE 1/4 IN.; INLET THREAD SIZE IN. 7/16-20UNJF-3A; ORIFICE DIAMETER 0.020 IN.; SERVICE OPERATING TEMPERATURE MINUS 300 DEG. F TO PLUS 250 DEG. F A
•
CRITICALITY CODE JUSTIFICATION: TEXT
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTION79K80240-11; STAINLESS STEEL,300 SERIES; BULKHEAD UNION; BULKHEAD FLARED TUBE SIZE 1/4 IN.; INLET THREAD SIZE IN. 7/16-20UNJF-3A; ORIFICE DIAMETER 0.020 IN.; SERVICE OPERATING TEMPERATURE MINUS 300 DEG. F TO PLUS 250 DEG. F A
CRITICALITY CODE JUSTIFICATIONTEXT
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 2
79K80237-11Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
P890-11Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AA1590-11?
AA1590-11 is a ORIFICE RESTRICTOR,GAS.
What parts can replace AA1590-11?
There are 2 known substitutes for AA1590-11: 79K80237-11, P890-11. Substitute compatibility should be verified for your specific system.
What is the NSN for AA1590-11?
AA1590-11 is cataloged in the U.S. Government catalog under NSN 4730-01-270-4103. 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.