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53-83531-21 — HOSE,AIR DUCT

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

53-83531-21: HOSE,AIR DUCT.

The HOSE,AIR DUCT is a the manufacturer industrial component. Key specifications include material: FIBERGLASS AND RUBBER FIRST PLY, wall_thickness: 0.120 INCHES NOMINAL IN, connection_type: SOFT FIRST END, inside_diameter: 1.250 INCHES NOMINAL FIRST END IN, connection_style: ROUND FIRST END, style_designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED. This part is cataloged in the U.S.

Government catalog under NSN 4720-00-054-7779, 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
53-83531-21
NSN: 4720-00-054-7779
FSC: 4720 — Hose and Flexible Tubing
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialFIBERGLASS AND RUBBER FIRST PLY
wall_thickness0.120 INCHES NOMINAL IN
connection_typeSOFT FIRST END
inside_diameter1.250 INCHES NOMINAL FIRST END IN
connection_styleROUND FIRST END
style_designatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
features_providedSTOWAGE DEVICE
end_overall_length1.250 INCHES NOMINAL FIRST END IN
operating_pressure3.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
end_inside_diameter1.375 INCHES NOMINAL FIRST END IN
cross-sectional_shape_styleROUND
measuring_method_and_length2.000 INCHES NOMINAL OVERALL IN
NSN4720-00-054-7779
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 53-83531-21 · 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: 2.000 INCHES NOMINAL OVERALL IN
•
CONNECTION STYLE: ROUND FIRST END
•
CONNECTION TYPE: SOFT FIRST END
•
STYLE DESIGNATOR: HELICALLY WOUND CONTINOUS WIRE SUPPORTED
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
WALL THICKNESS: 0.120 INCHES NOMINAL IN
•
OPERATING PRESSURE: 3.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
FEATURES PROVIDED: STOWAGE DEVICE
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH2.000 INCHES NOMINAL OVERALL IN
CONNECTION STYLEROUND FIRST END
CONNECTION TYPESOFT FIRST END
STYLE DESIGNATORHELICALLY WOUND CONTINOUS WIRE SUPPORTED
CROSS-SECTIONAL SHAPE STYLEROUND
WALL THICKNESS0.120 INCHES NOMINAL IN
OPERATING PRESSURE3.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
FEATURES PROVIDEDSTOWAGE DEVICE
INSIDE DIAMETER1.250 INCHES NOMINAL FIRST END IN
END OVERALL LENGTH1.250 INCHES NOMINAL FIRST END IN
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
3-5707-21Reference 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 53-83531-21?
53-83531-21 is a HOSE,AIR DUCT.
What parts can replace 53-83531-21?
There is 1 known substitute for 53-83531-21: 3-5707-21. Substitute compatibility should be verified for your specific system.
What is the NSN for 53-83531-21?
53-83531-21 is cataloged in the U.S. Government catalog under NSN 4720-00-054-7779. 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.