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VV421 — HOSE,AIR DUCT

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

VV421: HOSE,AIR DUCT.

The HOSE,AIR DUCT is a the manufacturer industrial component. Key specifications include material: PLASTIC SINGLE PLY, connection_type: PLAIN BOTH ENDS, inside_diameter: 4.000 INCHES NOMINAL FIRST END IN, style_designator: FULLY CONVOLUTED, features_provided: FLAME RESISTANT, cross-sectional_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-003-4054, 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
VV421
NSN: 4720-01-003-4054
FSC: 4720 — Hose and Flexible Tubing
CAGE: 32374 — P-G ASSCO CORP (USA)
SPECIFICATIONS
materialPLASTIC SINGLE PLY
connection_typePLAIN BOTH ENDS
inside_diameter4.000 INCHES NOMINAL FIRST END IN
style_designatorFULLY CONVOLUTED
features_providedFLAME RESISTANT
cross-sectional_shape_styleROUND
measuring_method_and_length240.000 INCHES NOMINAL OVERALL IN
NSN4720-01-003-4054
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: VV421 · 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: 240.000 INCHES NOMINAL OVERALL IN
•
CONNECTION TYPE: PLAIN BOTH ENDS
•
STYLE DESIGNATOR: FULLY CONVOLUTED
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
FEATURES PROVIDED: FLAME RESISTANT
•
INSIDE DIAMETER: 4.000 INCHES NOMINAL FIRST END IN
•
MATERIAL: PLASTIC SINGLE PLY
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH240.000 INCHES NOMINAL OVERALL IN
CONNECTION TYPEPLAIN BOTH ENDS
STYLE DESIGNATORFULLY CONVOLUTED
CROSS-SECTIONAL SHAPE STYLEROUND
FEATURES PROVIDEDFLAME RESISTANT
INSIDE DIAMETER4.000 INCHES NOMINAL FIRST END IN
MATERIALPLASTIC SINGLE PLY
OTHER ITEMS IN FSC 4720 — Hose and Flexible Tubing
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4720-00-000-0080 4720-00-000-0081 4720-00-000-0084 4720-00-000-0724 4720-00-001-0014 4720-00-001-0015 4720-00-001-0023 4720-00-001-0025
SUBSTITUTES & CROSS-REFERENCES 1
VV420Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is VV421?
VV421 is a HOSE,AIR DUCT.
What parts can replace VV421?
There is 1 known substitute for VV421: VV420. Substitute compatibility should be verified for your specific system.
What is the NSN for VV421?
VV421 is cataloged in the U.S. Government catalog under NSN 4720-01-003-4054. 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.