PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet
MRO / Pipe, Tubing, Hose, and Fittings / 4720-00-990-1685

26521Hose,preformed

Gates Corporation · NSN 4720-00-990-1685 · FSC 4720 · No Item Name Available
Verified by PartsTable
NSN 4720-00-990-1685 — this item is cataloged by the U.S. Government under National Stock Number 4720-00-990-1685. Primary manufacturer part number: 26521.
END VIEW L 1.500 INCHES MINIMUM IN Wall: 0.125 INCHES MINIMUM IN PIPE CROSS SECTION
4720-00-990-1685 — No Item Name Available illustration
Features
  • Hose,preformed — FSC 4720
  • Wall Thickness: 0.125 INCHES MINIMUM IN
  • First Arm Length: 1.500 INCHES MINIMUM IN
  • Second Arm Length: 2.000 INCHES MAXIMUM IN
  • Material: RUBBER SYNTHETIC COVER
  • Working Length: 14.000 INCHES NOMINAL IN
  • Material: RUBBER SYNTHETIC OVERALL
  • Style Designator: STRAIGHT CORRUGATED
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Rubber Synthetic Cover construction
General Description

The Hose,preformed, cataloged under National Stock Number 4720-00-990-1685, 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 Gates Corporation. Government technical data includes 8 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4720-00-990-1685
Primary Part Number26521
Item NameHose,preformed
FSC / FSG4720 / 47 — No Item Name Available
ManufacturerGates Corporation
StatusCANCELLED
Wall Thickness0.125 INCHES MINIMUM IN
First Arm Length1.500 INCHES MINIMUM IN
Second Arm Length2.000 INCHES MAXIMUM IN
MaterialRUBBER SYNTHETIC COVER
Working Length14.000 INCHES NOMINAL IN
MaterialRUBBER SYNTHETIC OVERALL
Style DesignatorSTRAIGHT CORRUGATED
Inside Diameter2.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
⇄ Verified Substitutes 10
5330-00-084-12302652-1 INTERCHANGEABLE
Gasket
Rockwell Collins, Inc. Dba Rc Displays Systems
2805-00-351-634426521 INTERCHANGEABLE
Valve,poppet,engine
Briggs and Stratton Corp
2915-00-370-90782-652-1 INTERCHANGEABLE
Fuel Float Valve Assembly
Parker Hannifin Corporation Div Aerospace Group Headquarters
5930-00-448-0001815-1853067SYM2652-1 INTERCHANGEABLE
Switch,magnet
Naval Ship Systems Command
2915-00-580-94089-253-51 INTERCHANGEABLE
Valve,float,aircraft Fuel Tank
Parker Hannifin Corporation Div Aerospace Group Headquarters
6615-00-786-708126521 INTERCHANGEABLE
Nut,synchro,lock
Parker-Hannifin Corporation Dba Control Systems Division
6625-00-980-1985M56 INTERCHANGEABLE
Voltmeter
Fluke Corp
5620-00-982-8182 INTERCHANGEABLE
Glass,sheet
5330-00-990-2179M56 INTERCHANGEABLE
Seal,oil
Fmc Technologies Inc Div Material Handling Solutions
5935-01-029-643326521 INTERCHANGEABLE
Connector,receptacle,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
Cross-Reference Index
Part NumberManufacturer
M56 Parker-Hannifin Corporation Dba Industrial Hose Product Division Div Hose Products Division (USA)
134 Acme-Hamilton Mfg Corp (USA)
VF104 Gates Corporation (USA)
26521 PRIMARY Gates Corporation (USA)
M56 Dayco Products Inc (USA)
Related Parts
5330-00-084-1230INTERCHANGEABLE
GASKET
2652-1
2805-00-351-6344INTERCHANGEABLE
VALVE,POPPET,ENGINE
26521
2915-00-370-9078INTERCHANGEABLE
FUEL FLOAT VALVE ASSEMBLY
2-652-1
5930-00-448-0001INTERCHANGEABLE
SWITCH,MAGNET
815-1853067SYM2652-1
2915-00-580-9408INTERCHANGEABLE
VALVE,FLOAT,AIRCRAFT FUEL TANK
9-253-51
6615-00-786-7081INTERCHANGEABLE
NUT,SYNCHRO,LOCK
26521
6625-00-980-1985INTERCHANGEABLE
VOLTMETER
M56
5620-00-982-8182INTERCHANGEABLE
GLASS,SHEET
5330-00-990-2179INTERCHANGEABLE
SEAL,OIL
M56
5935-01-029-6433INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
26521

Frequently Asked Questions

What is NSN 4720-00-990-1685?

NSN 4720-00-990-1685 is a Hose,preformed, manufactured by Gates Corporation, classified under FSC 4720 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4720-00-990-1685?

NSN 4720-00-990-1685 has 5 cross-referenced part numbers: M56 (Parker-Hannifin Corporation Dba Industrial Hose Product Division Div Hose Products Division), 134 (Acme-Hamilton Mfg Corp), VF104 (Gates Corporation), 26521 (Gates Corporation), M56 (Dayco Products Inc).

What NSN replaces 4720-00-990-1685?

There are 10 known substitutes for 4720-00-990-1685: 5330-00-084-1230, 2805-00-351-6344, 2915-00-370-9078 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 26521?

Key specifications for 26521: Wall Thickness: 0.125 INCHES MINIMUM IN; First Arm Length: 1.500 INCHES MINIMUM IN; Special Features: HEAT SHALL WITHSTAND A -40 DEG TEMPERATURE AND BE RESISTANT TO HEAT,CHEMICALS,OIL,WET ROT OR ANY TYPE OF ANTI-FREEZE,RUST INHIBITORS,OR LIQUIDS USED IN ENGINE COOLANT SYSTEMS; Second Arm Length: 2.000 INCHES MAXIMUM IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4720-00-990-1685 still in active supply?

NSN 4720-00-990-1685 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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