PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

266AS100-3Hose,air Breathing

Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · NSN 4720-00-045-8090 · FSC 4720 · No Item Name Available
Verified by PartsTable
NSN 4720-00-045-8090 — this item is cataloged by the U.S. Government under National Stock Number 4720-00-045-8090. Primary manufacturer part number: 266AS100-3.
Features
  • Hose,air Breathing — FSC 4720
  • Connection Type: PLAIN FIRST END
  • Cross-Sectional Shape Style: ROUND
  • Operating Pressure: 40.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED
  • Measuring Method and Length: 72.000 INCHES NOMINAL OVERALL IN
  • Inside Diameter: 0.875 INCHES NOMINAL FIRST END IN
  • Wall Thickness: 0.109 INCHES NOMINAL IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Hose,air Breathing, cataloged under National Stock Number 4720-00-045-8090, is classified within Federal Supply Class 4720 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4720-00-045-8090
Primary Part Number266AS100-3
Item NameHose,air Breathing
FSC / FSG4720 / 47 — No Item Name Available
ManufacturerNaval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
StatusACTIVE
Connection TypePLAIN FIRST END
Cross-Sectional Shape StyleROUND
Operating Pressure40.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Style DesignatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
Measuring Method and Length72.000 INCHES NOMINAL OVERALL IN
Inside Diameter0.875 INCHES NOMINAL FIRST END IN
Wall Thickness0.109 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4720-00-097-1329REDAR-A80910-6 INTERCHANGEABLE
Hose,air Duct
R.e. Darling Co., Inc.
4720-00-108-5620 INTERCHANGEABLE
Hose Assembly,air Breathing
4720-00-393-5076 INTERCHANGEABLE
Hose,air Breathing
4720-00-545-5473 INTERCHANGEABLE
Hose,air Breathing
4720-00-705-6900 INTERCHANGEABLE
Hose,air Breathing
4720-00-762-2336 INTERCHANGEABLE
Hose,air Breathing
4720-00-781-4703266AS100-2 INTERCHANGEABLE
Hose,air Breathing
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
4720-00-789-2612 INTERCHANGEABLE
Hose Assembly,air Breathing
4720-00-814-8157 INTERCHANGEABLE
Hose Assembly,air Breathing
4720-00-915-4603REDAR-A10116-02 INTERCHANGEABLE
Hose Assembly,air Breathing
R.e. Darling Co., Inc.
Cross-Reference Index
Part NumberManufacturer
REDAR A90105-13 R.e. Darling Co., Inc. (USA)
WS4127-3-72 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
266AS100-3 PRIMARY Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
MIL-H-81581 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-H-81581/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4720-00-097-1329INTERCHANGEABLE
HOSE,AIR DUCT
REDAR-A80910-6
4720-00-108-5620INTERCHANGEABLE
HOSE ASSEMBLY,AIR BREATHING
4720-00-393-5076INTERCHANGEABLE
HOSE,AIR BREATHING
4720-00-545-5473INTERCHANGEABLE
HOSE,AIR BREATHING
4720-00-705-6900INTERCHANGEABLE
HOSE,AIR BREATHING
4720-00-762-2336INTERCHANGEABLE
HOSE,AIR BREATHING
4720-00-781-4703INTERCHANGEABLE
HOSE,AIR BREATHING
266AS100-2
4720-00-789-2612INTERCHANGEABLE
HOSE ASSEMBLY,AIR BREATHING
4720-00-814-8157INTERCHANGEABLE
HOSE ASSEMBLY,AIR BREATHING
4720-00-915-4603INTERCHANGEABLE
HOSE ASSEMBLY,AIR BREATHING
REDAR-A10116-02
4720-01-041-8003INTERCHANGEABLE
HOSE,AIR BREATHING
REDAR-A80910-25
4720-01-042-0679INTERCHANGEABLE
HOSE,AIR DUCT
REDAR-A80910-29

Frequently Asked Questions

What is NSN 4720-00-045-8090?

NSN 4720-00-045-8090 is a Hose,air Breathing, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4720 (No Item Name Available). Status: active.

What are the part numbers for NSN 4720-00-045-8090?

NSN 4720-00-045-8090 has 5 cross-referenced part numbers: REDAR A90105-13 (R.e. Darling Co., Inc.), WS4127-3-72 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 266AS100-3 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), MIL-H-81581 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-H-81581/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4720-00-045-8090?

There are 12 known substitutes for 4720-00-045-8090: 4720-00-097-1329, 4720-00-108-5620, 4720-00-393-5076 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 266AS100-3?

Key specifications for 266AS100-3: Connection Type: PLAIN FIRST END; Cross-Sectional Shape Style: ROUND; Operating Pressure: 40.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Special Features: EXTERIOR COLOR IS GREEN. 8 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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