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Technical Data Sheet
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IT-4449 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The HOSE,AIR DUCT is a the manufacturer industrial component. Key specifications include material: STEEL REINFORCING WIRE, wall_thickness: 0.040 INCHES NOMINAL IN, connection_type: SOFT BOTH ENDS, inside_diameter: 3.750 INCHES NOMINAL FIRST END IN, connection_style: ROUND BOTH ENDS, special_features: ONE SOFT END WITH A 10 DEGREE BEND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-135-7957, 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
IT-4449
NSN: 4720-00-135-7957
FSC: 4720
CAGE: 26831 — INDUSTRIAL TUBE CO LLC DBA INDUSTRIAL TUBE CO LLC DIV INDUSTRIAL TUBE COMPANY, LLC (USA)
SPECIFICATIONS
materialSTEEL REINFORCING WIRE
wall_thickness0.040 INCHES NOMINAL IN
connection_typeSOFT BOTH ENDS
inside_diameter3.750 INCHES NOMINAL FIRST END IN
connection_styleROUND BOTH ENDS
special_featuresONE SOFT END WITH A 10 DEGREE BEND
style_designatorFULLY CONVOLUTED
end_overall_length1.750 INCHES NOMINAL BOTH ENDS IN
end_inside_diameter3.750 INCHES NOMINAL BOTH ENDS IN
cross-sectional_shape_styleROUND
measuring_method_and_length13.630 INCHES NOMINAL OVERALL IN
NSN4720-00-135-7957
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: IT-4449 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: RUBBER SYNTHETIC FIRST PLY
•
CONNECTION STYLE: ROUND BOTH ENDS
•
STYLE DESIGNATOR: FULLY CONVOLUTED
•
END INSIDE DIAMETER: 3.750 INCHES NOMINAL BOTH ENDS IN
•
CONNECTION TYPE: SOFT BOTH ENDS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SYNTHETIC FIRST PLY
CONNECTION STYLEROUND BOTH ENDS
SPECIAL FEATURESONE SOFT END WITH A 10 DEGREE BEND
STYLE DESIGNATORFULLY CONVOLUTED
MATERIALSTEEL REINFORCING WIRE
MATERIALRUBBER SYNTHETIC SECOND PLY
END INSIDE DIAMETER3.750 INCHES NOMINAL BOTH ENDS IN
CONNECTION TYPESOFT BOTH ENDS
END OVERALL LENGTH1.750 INCHES NOMINAL BOTH ENDS IN
MEASURING METHOD AND LENGTH13.630 INCHES NOMINAL OVERALL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
B098Interchangeable
interchangeable cross-reference
interchangeable
5137Interchangeable
interchangeable cross-reference
interchangeable
RD23Interchangeable
interchangeable cross-reference
interchangeable
2149AInterchangeable
interchangeable cross-reference
interchangeable
PA4141Interchangeable
interchangeable cross-reference
interchangeable
ASTM B221Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is IT-4449?
IT-4449 is a HOSE,AIR DUCT.
What parts can replace IT-4449?
There are 15 known substitutes for IT-4449: B098, 5137, RD23 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for IT-4449?
IT-4449 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-135-7957. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026