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NSN 4720-01-373-5641Government record, cited
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Hose Assembly, Nonmetallic4720-01-373-5641

NSN 4720-01-373-5641 · NIIN 013735641 · Part number 6558499-9
Naval Sea Systems Command · FSC 4720 — Hose and Flexible Tubing · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 53711
Government record, cited
NSN 4720-01-373-5641 — this item is cataloged by the U.S. Government under National Stock Number 4720-01-373-5641. Manufacturer of record part number: 6558499-9.
Also searched as  4720-01-373-5641 · 4720013735641 · NIIN 013735641 · 01-373-5641 · FSC 4720 Hose and Flexible Tubing · CAGE 53711 · 6558499-9 · K801MWH0606-6-6-6B-16.500 · 6558499 · 801MWH0606-6-6-6B-16.500 · 801MWH0606-6-6-6B-16.500
Nearby stock numbers  ·
END VIEW L 16.500 INCHES NOMINAL OVERALL IN OD 0.630 INCHES NOMINAL IN PIPE CROSS SECTION
4720-01-373-5641 — Hose and Flexible Tubing
Features
  • Hose Assembly,nonmetallic — FSC 4720
  • Measuring Method and Length: 16.500 INCHES NOMINAL OVERALL IN
  • Temp Rating: -40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Minimum Inside Bending Radius: 3.000 INCHES IN
  • Connection Style: SWIVEL NUT FLARE FIRST END
  • End Connection Design: STRAIGHT FIRST END
  • Layer Composition and Location: 1ST LAYER BRAIDED TEXTILE YARN AND OUTER LAYER WRAPPED RUBBER, SYNTHETIC
  • Connection Type: THREADED INTERNAL TUBE FIRST END
Identification
  • NSN: 4720-01-373-5641
  • NIIN: 013735641
  • FSC: 4720 — Hose and Flexible Tubing
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
  • Primary part number: 6558499-9
  • Manufacturer: Naval Sea Systems Command
General Description

The Hose Assembly,nonmetallic, cataloged under National Stock Number 4720-01-373-5641, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4720-01-373-5641
Primary Part Number6558499-9
Item NameHose Assembly,nonmetallic
FSC / FSG4720 / 47 — Hose and Flexible Tubing
ManufacturerNaval Sea Systems Command
StatusACTIVE
Measuring Method and Length16.500 INCHES NOMINAL OVERALL IN
Temp Rating-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
Minimum Inside Bending Radius3.000 INCHES IN
Connection StyleSWIVEL NUT FLARE FIRST END
End Connection DesignSTRAIGHT FIRST END
Layer Composition and Location1ST LAYER BRAIDED TEXTILE YARN AND OUTER LAYER WRAPPED RUBBER, SYNTHETIC
Connection TypeTHREADED INTERNAL TUBE FIRST END
Cross-Sectional Shape StyleROUND
Outside Diameter0.630 INCHES NOMINAL IN
Operating Pressure250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
Thread DirectionRIGHT-HAND FIRST END
Nominal Thread Size0.562 INCHES FIRST END IN
Seat Angle37.0 DEGREES FIRST END
Exterior ColorBLUE
Inside Diameter0.375 INCHES NOMINAL IN
Inside Surface ConditionSMOOTH
Media for Which DesignedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
Hydrostatic Test Pressure500.0 POUNDS PER SQUARE INCH LBS
Thread Class2B FIRST END
Burst Test Pressure1000.0 POUNDS PER SQUARE INCH LBS
Thread Series DesignatorUNF FIRST END
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4720-01-373-5642K801MBL0606-6-6-6B-10.000 POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division
4720-01-373-5643K801MBL0606-6-6-6B-11.000 POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division
4720-01-373-5644K801MWH0606-6-6-6B-31.00 POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division
4720-01-373-5645K801MWH0606-6-6-6B-19.30 POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division
4720-01-373-56466558499-7 POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Naval Sea Systems Command
4720-01-373-6434K801MWH0606-6-6-6B-22.000 POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division
4720-01-373-6435K801MWH0606-6-6-6B-24.000 POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division
Cross-Reference Index
Part NumberManufacturer
6558499-9 Naval Sea Systems Command (USA)
Reference documents
ReferenceMeaning
K801MWH0606-6-6-6B-16.500 3/2 Design control — primary reference
U.S. Government activity
6558499 D/9 Drawing number reference only
Naval Sea Systems Command
801MWH0606-6-6-6B-16.500 3/9 Design control — primary reference
U.S. Government activity
801MWH0606-6-6-6B-16.500 5/9 Secondary reference
U.S. Government activity
Related Parts
4720-01-373-5642POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
K801MBL0606-6-6-6B-10.000
4720-01-373-5643POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
K801MBL0606-6-6-6B-11.000
4720-01-373-5644POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
K801MWH0606-6-6-6B-31.00
4720-01-373-5645POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
K801MWH0606-6-6-6B-19.30
4720-01-373-5646POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
6558499-7
4720-01-373-6434POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
K801MWH0606-6-6-6B-22.000
4720-01-373-6435POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
K801MWH0606-6-6-6B-24.000

Frequently Asked Questions

What is NSN 4720-01-373-5641?

NSN 4720-01-373-5641 is a Hose Assembly,nonmetallic, manufactured by Naval Sea Systems Command, classified under FSC 4720, Hose and Flexible Tubing. Status: active.

What part numbers are listed for NSN 4720-01-373-5641?

NSN 4720-01-373-5641 has 1 manufacturer part number on file: 6558499-9 (Naval Sea Systems Command).

What NSN replaces 4720-01-373-5641?

7 possible matches (shared part number, not a government interchangeability claim): 4720-01-373-5642, 4720-01-373-5643, 4720-01-373-5644. Verify interchangeability with system specifications before substitution.

What are the specifications of 6558499-9?

Key specifications for 6558499-9: Measuring Method and Length: 16.500 INCHES NOMINAL OVERALL IN; Temp Rating: -40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF; Minimum Inside Bending Radius: 3.000 INCHES IN; Connection Style: SWIVEL NUT FLARE FIRST END. 21 specifications are documented in the U.S. Government catalog.

Is NSN 4720-01-373-5641 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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