PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3203Hose Assembly,metallic

Alter Harry Co the Div of T E C · NSN 4720-00-837-7640 · FSC 4720 · No Item Name Available
Verified by PartsTable
NSN 4720-00-837-7640 — this item is cataloged by the U.S. Government under National Stock Number 4720-00-837-7640. Primary manufacturer part number: 3203.
Features
  • Hose Assembly,metallic — FSC 4720
  • Cross-Sectional Shape Style: ROUND
  • Outside Diameter: 1.219 INCHES NOMINAL IN
  • Inner Conveying Tube Style: ANNULAR CLOSE-PITCH CORRUGATED
  • Measuring Method and Length: 11.500 INCHES NOMINAL OVERALL IN
  • Features Provided: IDENTICAL ENDS
  • End Connection Design: STRAIGHT FIRST END
  • Layer Composition and Location: OUTER LAYER BRAIDED COPPER WIRE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Hose Assembly,metallic, cataloged under National Stock Number 4720-00-837-7640, 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 Alter Harry Co the Div of T E C. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4720-00-837-7640
Primary Part Number3203
Item NameHose Assembly,metallic
FSC / FSG4720 / 47 — No Item Name Available
ManufacturerAlter Harry Co the Div of T E C
StatusACTIVE
Cross-Sectional Shape StyleROUND
Outside Diameter1.219 INCHES NOMINAL IN
Inner Conveying Tube StyleANNULAR CLOSE-PITCH CORRUGATED
Measuring Method and Length11.500 INCHES NOMINAL OVERALL IN
Features ProvidedIDENTICAL ENDS
End Connection DesignSTRAIGHT FIRST END
Layer Composition and LocationOUTER LAYER BRAIDED COPPER WIRE
Nominal Outside Diameter Tube Accommodated0.875 INCHES FIRST END IN
Connection TypeUNTHREADED EXTERNAL TUBE FIRST END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5330-00-100-7767 INTERCHANGEABLE
Seal Kit
5310-00-637-307917820 INTERCHANGEABLE
Washer,key
Curtiss-Wright Electro-Mechanical Corporation Div Epd
2920-00-640-74473248119 INTERCHANGEABLE
Starter,engine,electrical
Hatch & Kirk, Inc.
5826-00-716-3778 INTERCHANGEABLE
Rf Unit Assembly
4140-01-044-7993 INTERCHANGEABLE
Impeller,fan,axial
5935-01-215-7887MI-17820 INTERCHANGEABLE
Connector Body,plug,electrical
Times Microwave Systems, Inc Dba Times Microwave Systems Inc Div Times Microwave Systems
5935-01-393-409048555 INTERCHANGEABLE
Connector,plug,electrical
Times Microwave Systems, Inc Dba Times Microwave Systems Inc Div Times Microwave Systems
5315-01-395-781017820 INTERCHANGEABLE
Key,woodruff
Westerbeke Corporation
3460-01-457-815117-820 INTERCHANGEABLE
Chuck,drill
Delta Intl Machinery Corp
8415-01-479-020217820 INTERCHANGEABLE
Boot Liner Small
Saint-Gobain Performance Plastics Corp Div Coated Fabrics
Cross-Reference Index
Part NumberManufacturer
17820 Electro Impulse Laboratory Inc Dba Electro Impulse Inc (USA)
3203 PRIMARY Alter Harry Co the Div of T E C (USA)
Related Parts
5330-00-100-7767INTERCHANGEABLE
SEAL KIT
5310-00-637-3079INTERCHANGEABLE
WASHER,KEY
17820
2920-00-640-7447INTERCHANGEABLE
STARTER,ENGINE,ELECTRICAL
3248119
5826-00-716-3778INTERCHANGEABLE
RF UNIT ASSEMBLY
4140-01-044-7993INTERCHANGEABLE
IMPELLER,FAN,AXIAL
5935-01-215-7887INTERCHANGEABLE
CONNECTOR BODY,PLUG,ELECTRICAL
MI-17820
5935-01-393-4090INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
48555
5315-01-395-7810INTERCHANGEABLE
KEY,WOODRUFF
17820
3460-01-457-8151INTERCHANGEABLE
CHUCK,DRILL
17-820
8415-01-479-0202INTERCHANGEABLE
BOOT LINER SMALL
17820

Frequently Asked Questions

What is NSN 4720-00-837-7640?

NSN 4720-00-837-7640 is a Hose Assembly,metallic, manufactured by Alter Harry Co the Div of T E C, classified under FSC 4720 (No Item Name Available). Status: active.

What are the part numbers for NSN 4720-00-837-7640?

NSN 4720-00-837-7640 has 2 cross-referenced part numbers: 17820 (Electro Impulse Laboratory Inc Dba Electro Impulse Inc), 3203 (Alter Harry Co the Div of T E C).

What NSN replaces 4720-00-837-7640?

There are 10 known substitutes for 4720-00-837-7640: 5330-00-100-7767, 5310-00-637-3079, 2920-00-640-7447 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3203?

Key specifications for 3203: Cross-Sectional Shape Style: ROUND; Outside Diameter: 1.219 INCHES NOMINAL IN; Inner Conveying Tube Style: ANNULAR CLOSE-PITCH CORRUGATED; Measuring Method and Length: 11.500 INCHES NOMINAL OVERALL IN. 9 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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