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74531-48 — COUPLING BODY,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

74531-48: COUPLING BODY,TUBE.

The COUPLING BODY,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 356.0 OR ALUMINUM ALLOY, overall_length: 1.375 INCHES MINIMUM AND 1.459 INCHES MAXIMUM IN, outside_diameter: 3.891 INCHES NOMINAL IN, special_features: FURNISHED W/ALUMINUM ALLOY RING, style_designator: FLEXIBLE COUPLING BODY, surface_treatment: ANODIZE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-244-4908, 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
74531-48
NSN: 4730-01-244-4908
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79326 — TRANSDIGM INC DIV ADELWIGGINS GROUP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 356.0 OR ALUMINUM ALLOY
overall_length1.375 INCHES MINIMUM AND 1.459 INCHES MAXIMUM IN
outside_diameter3.891 INCHES NOMINAL IN
special_featuresFURNISHED W/ALUMINUM ALLOY RING
style_designatorFLEXIBLE COUPLING BODY
surface_treatmentANODIZE
working_temp_and_service_type160.0 DEG FAHRENHEIT NOMINAL OIL
working_pressure_and_service_type150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL LBS
tube_outside_diameter_for_which_designed3.000 INCHES NOMINAL IN
NSN4730-01-244-4908
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 74531-48 · 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: 160.0 DEG FAHRENHEIT NOMINAL OIL
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 3.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLEXIBLE COUPLING BODY
•
OUTSIDE DIAMETER: 3.891 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE
•
MATERIAL: ALUMINUM ALLOY 356.0 OR ALUMINUM ALLOY
TECHNICAL CHARACTERISTICS
WORKING TEMP AND SERVICE TYPE160.0 DEG FAHRENHEIT NOMINAL OIL
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED3.000 INCHES NOMINAL IN
STYLE DESIGNATORFLEXIBLE COUPLING BODY
OVERALL LENGTH1.375 INCHES MINIMUM AND 1.459 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.891 INCHES NOMINAL IN
SPECIAL FEATURESFURNISHED W/ALUMINUM ALLOY RING
SURFACE TREATMENTANODIZE
MATERIALALUMINUM ALLOY 356.0 OR ALUMINUM ALLOY
WORKING PRESSURE AND SERVICE TYPE150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL LBS
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
GC550GUReference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
GC550GU48Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74531-48?
74531-48 is a COUPLING BODY,TUBE.
What parts can replace 74531-48?
There are 2 known substitutes for 74531-48: GC550GU, GC550GU48. Substitute compatibility should be verified for your specific system.
What is the NSN for 74531-48?
74531-48 is cataloged in the U.S. Government catalog under NSN 4730-01-244-4908. 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.