PartsTable
Technical Data Sheet
Download PDF

253559 — HOSE ASSEMBLY,AIR DUCT

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

253559: HOSE ASSEMBLY,AIR DUCT.

The HOSE ASSEMBLY,AIR DUCT is a the manufacturer industrial component. Key specifications include coupling_style: PLAIN FLANGE SECOND END, wall_thickness: 0.050 INCHES NOMINAL IN, connection_type: COUPLING SECOND END, inside_diameter: 1.750 INCHES NOMINAL FIRST END IN, style_designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED, end_overall_length: 1.250 INCHES NOMINAL FIRST END IN. This part is cataloged in the U.S.

Government catalog under NSN 4720-00-167-4871, 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
253559
NSN: 4720-00-167-4871
FSC: 4720 — Hose and Flexible Tubing
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
coupling_stylePLAIN FLANGE SECOND END
wall_thickness0.050 INCHES NOMINAL IN
connection_typeCOUPLING SECOND END
inside_diameter1.750 INCHES NOMINAL FIRST END IN
special_features2ND END FLANGED WITH 8,0.219 INCH HOLES WITH A 2.750 INCH BOLT CIRCLE; O.D. OF FLANGE 3.380 INCH; FLEXIBLE HOSE IS 6.800 INCH COMPRESSED AND 33.800 INCH LENGTH EXTENDED IN
style_designatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
end_overall_length1.250 INCHES NOMINAL FIRST END IN
end_inside_diameter1.750 INCHES NOMINAL FIRST END IN
cross-sectional_shape_styleROUND
NSN4720-00-167-4871
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 253559 · 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
•
CONNECTION TYPE: COUPLING SECOND END
•
STYLE DESIGNATOR: HELICALLY WOUND CONTINOUS WIRE SUPPORTED
•
COUPLING STYLE: PLAIN FLANGE SECOND END
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
WALL THICKNESS: 0.050 INCHES NOMINAL IN
•
INSIDE DIAMETER: 1.750 INCHES NOMINAL FIRST END IN
•
END OVERALL LENGTH: 1.250 INCHES NOMINAL FIRST END IN
TECHNICAL CHARACTERISTICS
CONNECTION TYPECOUPLING SECOND END
CONNECTION TYPEPREFORMED FIRST END
STYLE DESIGNATORHELICALLY WOUND CONTINOUS WIRE SUPPORTED
COUPLING STYLEPLAIN FLANGE SECOND END
CROSS-SECTIONAL SHAPE STYLEROUND
WALL THICKNESS0.050 INCHES NOMINAL IN
INSIDE DIAMETER1.750 INCHES NOMINAL FIRST END IN
END OVERALL LENGTH1.250 INCHES NOMINAL FIRST END IN
SPECIAL FEATURES2ND END FLANGED WITH 8,0.219 INCH HOLES WITH A 2.750 INCH BOLT CIRCLE; O.D. OF FLANGE 3.380 INCH; FLEXIBLE HOSE IS 6.800 INCH COMPRESSED AND 33.800 INCH LENGTH EXTENDED IN
END INSIDE DIAMETER1.750 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 253559?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 253559?
253559 is a HOSE ASSEMBLY,AIR DUCT.
What is the NSN for 253559?
253559 is cataloged in the U.S. Government catalog under NSN 4720-00-167-4871. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 253559

✓ 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.