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Technical Data Sheet
PartsTable / COMPONENT / 8B783057-21
8B783057-21 ✓ 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: FIBERGLASS AND RUBBER SILICONE CLASS Q THIRD PLY, connection_type: SOFT FIRST END, inside_diameter: 2.750 INCHES NOMINAL FIRST END IN, connection_style: ROUND FIRST END, style_designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED, end_overall_length: 1.500 INCHES NOMINAL FIRST END IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-217-6821, 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
8B783057-21
NSN: 4720-00-217-6821
FSC: 4720
CAGE: 89446 — HILLER AIRCRAFT CORPORATION (USA)
SPECIFICATIONS
materialFIBERGLASS AND RUBBER SILICONE CLASS Q THIRD PLY
connection_typeSOFT FIRST END
inside_diameter2.750 INCHES NOMINAL FIRST END IN
connection_styleROUND FIRST END
style_designatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
end_overall_length1.500 INCHES NOMINAL FIRST END IN
operating_pressure5.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
end_inside_diameter2.750 INCHES NOMINAL FIRST END IN
cross-sectional_shape_styleROUND
measuring_method_and_length24.000 INCHES NOMINAL OVERALL IN
NSN4720-00-217-6821
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 8B783057-21 · 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
•
CONNECTION TYPE: SOFT FIRST END
•
MATERIAL: FIBERGLASS AND RUBBER SILICONE CLASS Q THIRD PLY
•
END OVERALL LENGTH: 1.500 INCHES NOMINAL FIRST END IN
•
END INSIDE DIAMETER: 2.750 INCHES NOMINAL FIRST END IN
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OPERATING PRESSURE: 5.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPESOFT FIRST END
MATERIALFIBERGLASS AND RUBBER SILICONE CLASS Q THIRD PLY
END OVERALL LENGTH1.500 INCHES NOMINAL FIRST END IN
END INSIDE DIAMETER2.750 INCHES NOMINAL FIRST END IN
CROSS-SECTIONAL SHAPE STYLEROUND
MATERIALFIBERGLASS AND RUBBER SILICONE CLASS Q FIRST PLY
OPERATING PRESSURE5.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
MATERIALFIBERGLASS AND RUBBER SILICONE CLASS Q REINFORCING CORD
MEASURING METHOD AND LENGTH24.000 INCHES NOMINAL OVERALL IN
STYLE DESIGNATORHELICALLY WOUND CONTINOUS WIRE SUPPORTED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
31310Interchangeable
interchangeable cross-reference
interchangeable
322235Interchangeable
interchangeable cross-reference
interchangeable
R4303SInterchangeable
interchangeable cross-reference
interchangeable
GGG-F-331 TY18CL6Interchangeable
interchangeable cross-reference
interchangeable
GGG-F-331Interchangeable
interchangeable cross-reference
interchangeable
A-A-2447Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8B783057-21?
8B783057-21 is a HOSE,AIR DUCT.
What parts can replace 8B783057-21?
There are 23 known substitutes for 8B783057-21: 31310, 322235, R4303S and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8B783057-21?
8B783057-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-217-6821. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026