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GC550FH0408 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

GC550FH0408: 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, thread_class: 3A ALL ENDS A, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 0.437 INCHES FIRST END IN, maximum_operating_temp: 135.0 CELSIUS SINGLE RESPONSE DEGC. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-006-7905, 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
GC550FH0408
NSN: 4730-00-006-7905
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialTITANIUM ALLOY UNS R54520 OVERALL
thread_class3A ALL ENDS A
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.437 INCHES FIRST END IN
maximum_operating_temp135.0 CELSIUS SINGLE RESPONSE DEGC
nominal_overall_length1.002 INCHES IN
thread_quantity_per_inch24 FIRST END
thread_series_designatorUNJS FIRST END
nominal_outside_diameter_tube_accommodated0.250 INCHES FIRST END IN
NSN4730-00-006-7905
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: GC550FH0408 · 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: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
NOMINAL OVERALL LENGTH: 1.002 INCHES IN
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL THREAD SIZE: 0.437 INCHES FIRST END IN
•
MAXIMUM OPERATING TEMP: 135.0 CELSIUS SINGLE RESPONSE DEGC
TECHNICAL CHARACTERISTICS
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLECUSHION SEAL (TUBE) FIRST END
NOMINAL OVERALL LENGTH1.002 INCHES IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL THREAD SIZE0.437 INCHES FIRST END IN
NOMINAL THREAD SIZE0.750 INCHES SECOND END IN
MAXIMUM OPERATING TEMP135.0 CELSIUS SINGLE RESPONSE DEGC
THREAD CLASS3A ALL ENDS A
THREAD QUANTITY PER INCH24 FIRST END
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 4
4730PL1773874Reference document
Same NSN cross-reference
Reference document — Informative reference only
4730PL0577552Reference document
Same NSN cross-reference
Reference document — Informative reference only
R44191T-0408Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
C7566-0408Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 GC550FH0408?
GC550FH0408 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace GC550FH0408?
There are 4 known substitutes for GC550FH0408: 4730PL1773874, 4730PL0577552, R44191T-0408 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GC550FH0408?
GC550FH0408 is cataloged in the U.S. Government catalog under NSN 4730-00-006-7905. 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.