Bonnet Assembly4420-01-005-8449

NSN 4420-01-005-8449 · NIIN 010058449

FSC 4420 — Heat Exchangers and Steam Condensers · FSG 44 — Furnace, Steam, Drying, Nuclear Reactors

Government record, cited

Also searched as 4420-01-005-8449 · 4420010058449 · NIIN 010058449 · 01-005-8449 · FSC 4420 Heat Exchangers and Steam Condensers · 5-144-02-030-001PC2 · 4-090-02-515-004

Nearby stock numbers ← 4420-01-004-1365 · 4420-01-006-4719 →

Features

Bonnet Assembly — FSC 4420

Identification

NSN: 4420-01-005-8449
NIIN: 010058449
FSC: 4420 — Heat Exchangers and Steam Condensers
FSG: 44 — Furnace, Steam, Drying, Nuclear Reactors

General Description

The Bonnet Assembly, cataloged under National Stock Number 4420-01-005-8449, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Bonnet Assembly
FSC / FSG	4420 — Heat Exchangers and Steam Condensers (FSG 44)

Technical Specifications

Parameter	Value
NSN	4420-01-005-8449
Item Name	Bonnet Assembly
FSC / FSG	4420 / 44 — Heat Exchangers and Steam Condensers
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
5-144-02-030-001PC2	5/9 Secondary reference Howden Buffalo, Inc Div Howden Gyrol Fluid Drives
4-090-02-515-004	3/9 Design control — primary reference Howden Buffalo, Inc Div Howden Gyrol Fluid Drives

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 4420-01-005-8449?

NSN 4420-01-005-8449 is a Bonnet Assembly, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.

Is NSN 4420-01-005-8449 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.

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

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