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IT221-16 — HOSE,AIR DUCT

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

IT221-16: HOSE,AIR DUCT.

The HOSE,AIR DUCT is a the manufacturer industrial component. Key specifications include material: STEEL REINFORCING WIRE, wall_thickness: 0.047 INCHES NOMINAL IN, connection_type: PLAIN FIRST END, inside_diameter: 4.000 INCHES NOMINAL FIRST END IN, style_designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED, operating_pressure: 31.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-026-5241, 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
IT221-16
NSN: 4720-01-026-5241
FSC: 4720 — Hose and Flexible Tubing
CAGE: 26831 — INDUSTRIAL TUBE CO LLC DBA INDUSTRIAL TUBE CO LLC DIV INDUSTRIAL TUBE COMPANY, LLC (USA)
SPECIFICATIONS
materialSTEEL REINFORCING WIRE
wall_thickness0.047 INCHES NOMINAL IN
connection_typePLAIN FIRST END
inside_diameter4.000 INCHES NOMINAL FIRST END IN
style_designatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
operating_pressure31.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
cross-sectional_shape_styleROUND
measuring_method_and_length132.000 INCHES NOMINAL OVERALL IN
minimum_inside_bending_radius1.250 INCHES IN
NSN4720-01-026-5241
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: IT221-16 · 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
•
MEASURING METHOD AND LENGTH: 132.000 INCHES NOMINAL OVERALL IN
•
MINIMUM INSIDE BENDING RADIUS: 1.250 INCHES IN
•
CONNECTION TYPE: PLAIN FIRST END
•
STYLE DESIGNATOR: HELICALLY WOUND CONTINOUS WIRE SUPPORTED
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
WALL THICKNESS: 0.047 INCHES NOMINAL IN
•
OPERATING PRESSURE: 31.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
INSIDE DIAMETER: 4.000 INCHES NOMINAL FIRST END IN
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH132.000 INCHES NOMINAL OVERALL IN
MINIMUM INSIDE BENDING RADIUS1.250 INCHES IN
CONNECTION TYPEPLAIN FIRST END
STYLE DESIGNATORHELICALLY WOUND CONTINOUS WIRE SUPPORTED
CROSS-SECTIONAL SHAPE STYLEROUND
WALL THICKNESS0.047 INCHES NOMINAL IN
OPERATING PRESSURE31.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
INSIDE DIAMETER4.000 INCHES NOMINAL FIRST END IN
MATERIALSTEEL REINFORCING WIRE
MATERIALFIBERGLASS AND RUBBER SILICONE CLASS Q ALL PLIES
SUBSTITUTES & CROSS-REFERENCES 2
B6209Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
GS4IN IDX12IN LReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is IT221-16?
IT221-16 is a HOSE,AIR DUCT.
What parts can replace IT221-16?
There are 2 known substitutes for IT221-16: B6209, GS4IN IDX12IN L. Substitute compatibility should be verified for your specific system.
What is the NSN for IT221-16?
IT221-16 is cataloged in the U.S. Government catalog under NSN 4720-01-026-5241. 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.