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1B4674 — ADAPTER,STRAIGHT,FLANGE TO TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1B4674: ADAPTER,STRAIGHT,FLANGE TO TUBE.

ADAPTER,STRAIGHT,FLANGE TO TUBE. Key specifications include material: STEEL CORROSION RESISTING OVERALL, flange_shape: RECTANGULAR WITH HOLES SECOND END, connection_type: FLANGE SECOND END, connection_style: PLAIN (TUBE) FIRST END, special_features: ACTION ID 45492611, bolt_hole_quantity: 4 SECOND END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-388-2819, 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
1B4674
NSN: 4730-01-388-2819
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
flange_shapeRECTANGULAR WITH HOLES SECOND END
connection_typeFLANGE SECOND END
connection_stylePLAIN (TUBE) FIRST END
special_featuresACTION ID 45492611
bolt_hole_quantity4 SECOND END
end_item_identificationC17 ENGINE
material_document_and_classificationAMS5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated2.000 INCHES FIRST END IN
NSN4730-01-388-2819
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1B4674 · 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
•
FLANGE SHAPE: RECTANGULAR WITH HOLES SECOND END
•
CONNECTION STYLE: PLAIN (TUBE) FIRST END
•
CONNECTION TYPE: FLANGE SECOND END
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 2.000 INCHES FIRST END IN
•
BOLT HOLE QUANTITY: 4 SECOND END
TECHNICAL CHARACTERISTICS
FLANGE SHAPERECTANGULAR WITH HOLES SECOND END
CONNECTION STYLEPLAIN (TUBE) FIRST END
CONNECTION TYPEFLANGE SECOND END
CONNECTION TYPEUNTHREADED EXTERNAL TUBE FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED2.000 INCHES FIRST END IN
BOLT HOLE QUANTITY4 SECOND END
SPECIAL FEATURESACTION ID 45492611
END ITEM IDENTIFICATIONC17 ENGINE
MATERIALSTEEL CORROSION RESISTING OVERALL
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1B4674?
1B4674 is a ADAPTER,STRAIGHT,FLANGE TO TUBE.
What is the NSN for 1B4674?
1B4674 is cataloged in the U.S. Government catalog under NSN 4730-01-388-2819. This indicates validated use in U.S. government and defense supply chains.
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