PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4037Hose,air Duct

Flexaust Inc · NSN 4720-00-540-2600 · FSC 4720 · No Item Name Available
Verified by PartsTable
NSN 4720-00-540-2600 — this item is cataloged by the U.S. Government under National Stock Number 4720-00-540-2600. Primary manufacturer part number: 4037.
Features
  • Hose,air Duct — FSC 4720
  • 12 verified cross-references
  • Primary manufacturer: Flexaust Inc
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Hose,air Duct, cataloged under National Stock Number 4720-00-540-2600, 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 Flexaust Inc. This item has 12 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameHose,air Duct
FSC / FSG4720 — No Item Name Available (FSG 47)
ManufacturersFlexaust Inc (CAGE 81518); Minot Hooper and Co (CAGE 97683); Joslyn Clark Controls, Llc (CAGE 61809); Challenger Electrical Equipment Corp Industrial Products Operation (CAGE 65788); Potomac Rubber Company, Inc. Dba Potomac Rubber Co Inc Div Potomac Rubber Co. (CAGE 83104)
Technical Specifications
ParameterValue
NSN4720-00-540-2600
Primary Part Number4037
Item NameHose,air Duct
FSC / FSG4720 / 47 — No Item Name Available
ManufacturerFlexaust Inc
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3439-00-020-8596 INTERCHANGEABLE
Heating Unit,electric Soldering
5305-00-072-35586110SS1032-7 INTERCHANGEABLE
Screw,externally Relieved Body
Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware
5930-00-108-69112154ALSPC30 INTERCHANGEABLE
Switch,toggle
Dynalec Corporation
5120-00-187-7129 INTERCHANGEABLE
Wrench,open End
6645-00-225-27324037 INTERCHANGEABLE
Wheel,eight Day
Wakmann Watch Company Inc
2910-00-333-3834 INTERCHANGEABLE
Pump,fuel,cam Actuated
5355-00-408-26384037 INTERCHANGEABLE
Dial Assy
Vemaline Products Inc Dba Handles Unlimited Div Handles Unlimited
5305-00-408-59874037 INTERCHANGEABLE
Thumbscrew
Roller Bearing Co of America, Inc Div Pic Design
5998-00-902-66984037 INTERCHANGEABLE
Electronic Components Assembly
The Bechdon Company, Llc
5330-00-990-25804037 INTERCHANGEABLE
Seal,plain Encased
Freudenberg-Nok General Partnership Dba Fredenberg-Nok Seals Division
Cross-Reference Index
Part NumberManufacturer
CWGP4X25 Flexaust Inc (USA)
TYPECWC Minot Hooper and Co (USA)
TYPEC-4IN. Joslyn Clark Controls, Llc (USA)
TYPEC-4IN. Challenger Electrical Equipment Corp Industrial Products Operation (USA)
CWC-4IN Potomac Rubber Company, Inc. Dba Potomac Rubber Co Inc Div Potomac Rubber Co. (USA)
3155-111 Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc (USA)
CWC4-00 Flexaust Inc (USA)
CWC4INDIA Flexaust Inc (USA)
4037 PRIMARY Flexaust Inc (USA)
FLX1001-32-0576-00 Flexfab Llc (USA)
FLX100132057600 Flexfab Llc (USA)
265K14 Molectron Detector Inc Dba Coherent-Molectron Div Portland (USA)
Related Parts
3439-00-020-8596INTERCHANGEABLE
HEATING UNIT,ELECTRIC SOLDERING
5305-00-072-3558INTERCHANGEABLE
SCREW,EXTERNALLY RELIEVED BODY
6110SS1032-7
5930-00-108-6911INTERCHANGEABLE
SWITCH,TOGGLE
2154ALSPC30
5120-00-187-7129INTERCHANGEABLE
WRENCH,OPEN END
6645-00-225-2732INTERCHANGEABLE
WHEEL,EIGHT DAY
4037
2910-00-333-3834INTERCHANGEABLE
PUMP,FUEL,CAM ACTUATED
5355-00-408-2638INTERCHANGEABLE
DIAL ASSY
4037
5305-00-408-5987INTERCHANGEABLE
THUMBSCREW
4037
5998-00-902-6698INTERCHANGEABLE
ELECTRONIC COMPONENTS ASSEMBLY
4037
5330-00-990-2580INTERCHANGEABLE
SEAL,PLAIN ENCASED
4037
5905-01-038-7825INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
91J2R0
6515-01-105-3589INTERCHANGEABLE
BLOOD SAMPLE COLLECTING KIT
4037-1

Frequently Asked Questions

What is NSN 4720-00-540-2600?

NSN 4720-00-540-2600 is a Hose,air Duct, manufactured by Flexaust Inc, classified under FSC 4720 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4720-00-540-2600?

NSN 4720-00-540-2600 has 12 cross-referenced part numbers: CWGP4X25 (Flexaust Inc), TYPECWC (Minot Hooper and Co), TYPEC-4IN. (Joslyn Clark Controls, Llc), TYPEC-4IN. (Challenger Electrical Equipment Corp Industrial Products Operation), CWC-4IN (Potomac Rubber Company, Inc. Dba Potomac Rubber Co Inc Div Potomac Rubber Co.) and 7 more.

What NSN replaces 4720-00-540-2600?

There are 12 known substitutes for 4720-00-540-2600: 3439-00-020-8596, 5305-00-072-3558, 5930-00-108-6911 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 4720-00-540-2600 still in active supply?

NSN 4720-00-540-2600 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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