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GC550FA — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

GC550FA: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY UNS R54520 OVERALL, leg_length: 0.438 INCHES MINIMUM AND 0.475 INCHES MAXIMUM SECOND END IN, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: PLAIN (TUBE) ALL ENDS, special_features: THREE SAFETY WIRE HOLES 120 DEGREES APART. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-004-2799, 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
GC550FA
NSN: 4730-00-004-2799
NIINs: 000042799, 000042800, 013879527, 014474193
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialTITANIUM ALLOY UNS R54520 OVERALL
leg_length0.438 INCHES MINIMUM AND 0.475 INCHES MAXIMUM SECOND END IN
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_stylePLAIN (TUBE) ALL ENDS
special_featuresTHREE SAFETY WIRE HOLES 120 DEGREES APART
style_designatorFLARELESS W/ OFFSET WRENCHING FACILITY
surface_treatmentLUBRICANT DRY FILM SEAT
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.437 INCHES ALL ENDS IN
maximum_operating_temp-54.0 FAHRENHEIT FIRST RESPONSE DEGF
nominal_overall_length1.187 INCHES IN
NSN4730-00-004-2799
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: GC550FA · 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: CUSHION SEAL (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.928 INCHES IN
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
STYLE DESIGNATOR: LONG W/ OFFSET WRENCHING FACILITY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 4965,6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.000 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
LEG LENGTH: 0.438 INCHES MINIMUM AND 0.475 INCHES MAXIMUM SECOND END IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLECUSHION SEAL (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH1.928 INCHES IN
CRITICALITY CODE JUSTIFICATIONFEAT
STYLE DESIGNATORLONG W/ OFFSET WRENCHING FACILITY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4965,6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.000 INCHES ALL ENDS IN
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
LEG LENGTH0.438 INCHES MINIMUM AND 0.475 INCHES MAXIMUM SECOND END IN
LEG LENGTH1.062 INCHES MINIMUM AND 1.097 INCHES MAXIMUM FIRST END IN
NOMINAL THREAD SIZE1.250 INCHES FIRST END BULKHEAD IN
SUBSTITUTES & CROSS-REFERENCES 8
AE16338-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
ST7M215Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
1520-13279-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
AE16117-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
TF301T16Reference document
Same NSN cross-reference
Reference document — Secondary reference
R44102T16Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GC550FA?
GC550FA is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace GC550FA?
There are 8 known substitutes for GC550FA: AE16338-16, ST7M215, 1520-13279-16 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GC550FA?
GC550FA is cataloged in the U.S. Government catalog under NSN 4730-00-004-2799. This indicates validated use in U.S. government and defense supply chains.
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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.