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GC550CF20A — COUPLING ASSEMBLY,TUBE,FLEXIBLE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

GC550CF20A: COUPLING ASSEMBLY,TUBE,FLEXIBLE.

COUPLING ASSEMBLY,TUBE,FLEXIBLE. Key specifications include material: ALUMINUM ALLOY 2024, overall_length: 1.431 INCHES MINIMUM AND 1.441 INCHES MAXIMUM IN, outside_diameter: 2.032 INCHES MAXIMUM IN, special_features: W/O FERRULE, style_designator: FLEXIBLE COUPLING ASSEMBLY, surface_treatment: ANODIZE. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-820-8561, 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
GC550CF20A
NSN: 4730-00-820-8561
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024
overall_length1.431 INCHES MINIMUM AND 1.441 INCHES MAXIMUM IN
outside_diameter2.032 INCHES MAXIMUM IN
special_featuresW/O FERRULE
style_designatorFLEXIBLE COUPLING ASSEMBLY
surface_treatmentANODIZE
working_temp_and_service_type200.0 DEG FAHRENHEIT NOMINAL JET FUEL
working_pressure_and_service_type125.0 POUNDS PER SQUARE INCH (PSI) NOMINAL JET FUEL LBS
material_document_and_classificationQQ-A-225/6 ASSN STD SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed1.250 INCHES NOMINAL IN
NSN4730-00-820-8561
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: GC550CF20A · 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
•
WORKING TEMP AND SERVICE TYPE: 200.0 DEG FAHRENHEIT NOMINAL JET FUEL
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLEXIBLE COUPLING ASSEMBLY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 ASSN STD SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 2.032 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE
TECHNICAL CHARACTERISTICS
WORKING TEMP AND SERVICE TYPE200.0 DEG FAHRENHEIT NOMINAL JET FUEL
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.250 INCHES NOMINAL IN
STYLE DESIGNATORFLEXIBLE COUPLING ASSEMBLY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH1.431 INCHES MINIMUM AND 1.441 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.032 INCHES MAXIMUM IN
SPECIAL FEATURESW/O FERRULE
SURFACE TREATMENTANODIZE
MATERIALALUMINUM ALLOY 2024
WORKING PRESSURE AND SERVICE TYPE125.0 POUNDS PER SQUARE INCH (PSI) NOMINAL JET FUEL LBS
SUBSTITUTES & CROSS-REFERENCES 2
AS1712D20Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS1710Reference document
Same NSN cross-reference
Reference document — Design control — primary 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 GC550CF20A?
GC550CF20A is a COUPLING ASSEMBLY,TUBE,FLEXIBLE.
What parts can replace GC550CF20A?
There are 2 known substitutes for GC550CF20A: AS1712D20, SAE-AS1710. Substitute compatibility should be verified for your specific system.
What is the NSN for GC550CF20A?
GC550CF20A is cataloged in the U.S. Government catalog under NSN 4730-00-820-8561. 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.