PartsTable TECHNICAL DATA SHEET

NSN 4420-01-298-8442Government record, cited

Core Assembly, Fluid Cooler4420-01-298-8442

NSN 4420-01-298-8442 · NIIN 012988442 · Part number 5266740

Raytheon Company Dba Raytheon Co · FSC 4420 — Heat Exchangers and Steam Condensers · FSG 44 — Furnace, Steam, Drying, Nuclear Reactors · CAGE 01534

Government record, cited

NSN 4420-01-298-8442 — this item is cataloged by the U.S. Government under National Stock Number 4420-01-298-8442. Manufacturer of record part number: 5266740.

Also searched as 4420-01-298-8442 · 4420012988442 · NIIN 012988442 · 01-298-8442 · FSC 4420 Heat Exchangers and Steam Condensers · CAGE 01534 · 5266740

Nearby stock numbers ← 4420-01-298-5425 Shell, Fluid Cooler, Industrial · 4420-01-299-3857 Controller, Level →

Features

Core Assembly,fluid Cooler — FSC 4420
Heat Transfer Method: INDIRECT
Style Designator: PLAIN COILED TUBE
Core Diameter: 11.200 INCHES NOMINAL IN
Tube Quantity: 9
Material Thickness: 0.035 INCHES NOMINAL IN
Core Length: 9.200 INCHES NOMINAL IN
Tubing Outside Diameter: 0.750 INCHES NOMINAL INNER TUBE INLET END IN

Identification

NSN: 4420-01-298-8442
NIIN: 012988442
FSC: 4420 — Heat Exchangers and Steam Condensers
FSG: 44 — Furnace, Steam, Drying, Nuclear Reactors
Primary part number: 5266740
Manufacturer: Raytheon Company Dba Raytheon Co

General Description

The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-298-8442, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Raytheon Company Dba Raytheon Co. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4420-01-298-8442
Primary Part Number	5266740
Item Name	Core Assembly,fluid Cooler
FSC / FSG	4420 / 44 — Heat Exchangers and Steam Condensers
Manufacturer	Raytheon Company Dba Raytheon Co
Status	ACTIVE
Heat Transfer Method	INDIRECT
Style Designator	PLAIN COILED TUBE
Core Diameter	11.200 INCHES NOMINAL IN
Tube Quantity	9
Material Thickness	0.035 INCHES NOMINAL IN
Core Length	9.200 INCHES NOMINAL IN
Tubing Outside Diameter	0.750 INCHES NOMINAL INNER TUBE INLET END IN
Material	STEEL CORROSION RESISTING OVERALL

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
5266740	Naval Sea Systems Command (USA)
5266740 PRIMARY	Raytheon Company Dba Raytheon Co (USA)

No interchangeability data on file.

Other items in FSC 4420 — Heat Exchangers and Steam Condensers

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4420-00-003-2812

CORE ASSEMBLY,FLUID HEATER,INDUS

4420-00-004-1071

4420-00-004-1071 · Item name not on file

4420-00-004-1072

4420-00-004-1072 · Item name not on file

4420-00-004-1073

4420-00-004-1073 · Item name not on file

4420-00-004-1074

4420-00-004-1074 · Item name not on file

4420-00-004-3860

COOLER,FLUID,INDUSTRIAL

4420-00-004-5260

4420-00-004-5260 · Item name not on file

4420-00-005-2335

PURGE ORIFICE ASSEMBLY

Frequently Asked Questions

What is NSN 4420-01-298-8442?

NSN 4420-01-298-8442 is a Core Assembly,fluid Cooler, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.

What part numbers are listed for NSN 4420-01-298-8442?

NSN 4420-01-298-8442 has 2 manufacturer part numbers on file: 5266740 (Naval Sea Systems Command), 5266740 (Raytheon Company Dba Raytheon Co).

What are the specifications of 5266740?

Key specifications for 5266740: Heat Transfer Method: INDIRECT; Style Designator: PLAIN COILED TUBE; Core Diameter: 11.200 INCHES NOMINAL IN; Tube Quantity: 9. 8 specifications are documented in the U.S. Government catalog.

Is NSN 4420-01-298-8442 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.

What is the DEMIL code for NSN 4420-01-298-8442?

NSN 4420-01-298-8442 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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.

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

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