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BE661-6 — HOSE ASSEMBLY,AIR DUCT

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

BE661-6: HOSE ASSEMBLY,AIR DUCT.

The HOSE ASSEMBLY,AIR DUCT is a the manufacturer industrial component. Key specifications include material: FIBERGLASS THIRD PLY, coupling_style: PLAIN FLANGE FIRST END, wall_thickness: 0.550 INCHES MAXIMUM IN, connection_type: COUPLING FIRST END, inside_diameter: 7.900 INCHES NOMINAL FIRST END IN, style_designator: FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-031-1097, 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
BE661-6
NSN: 4720-01-031-1097
FSC: 4720 — Hose and Flexible Tubing
CAGE: 05399 — BEMCO, INC (USA)
SPECIFICATIONS
materialFIBERGLASS THIRD PLY
coupling_stylePLAIN FLANGE FIRST END
wall_thickness0.550 INCHES MAXIMUM IN
connection_typeCOUPLING FIRST END
inside_diameter7.900 INCHES NOMINAL FIRST END IN
style_designatorFULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS
cross-sectional_shape_styleROUND
measuring_method_and_length2.750 INCHES NOMINAL OVERALL IN
NSN4720-01-031-1097
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: BE661-6 · 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: 2.750 INCHES NOMINAL OVERALL IN
•
CONNECTION TYPE: COUPLING FIRST END
•
STYLE DESIGNATOR: FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS
•
COUPLING STYLE: PLAIN FLANGE FIRST END
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
WALL THICKNESS: 0.550 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 7.900 INCHES NOMINAL FIRST END IN
•
MATERIAL: FIBERGLASS SECOND PLY
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH2.750 INCHES NOMINAL OVERALL IN
CONNECTION TYPECOUPLING FIRST END
STYLE DESIGNATORFULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS
COUPLING STYLEPLAIN FLANGE FIRST END
CROSS-SECTIONAL SHAPE STYLEROUND
WALL THICKNESS0.550 INCHES MAXIMUM IN
INSIDE DIAMETER7.900 INCHES NOMINAL FIRST END IN
MATERIALFIBERGLASS SECOND PLY
MATERIALFIBERGLASS FOURTH PLY
MATERIALSTEEL COVER
SUBSTITUTES & CROSS-REFERENCES 1
BE661Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BE661-6?
BE661-6 is a HOSE ASSEMBLY,AIR DUCT.
What parts can replace BE661-6?
There is 1 known substitute for BE661-6: BE661. Substitute compatibility should be verified for your specific system.
What is the NSN for BE661-6?
BE661-6 is cataloged in the U.S. Government catalog under NSN 4720-01-031-1097. 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.