Damper, Flue4520-01-083-3681

NSN 4520-01-083-3681 · NIIN 010833681

FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal

Government record, cited

Also searched as 4520-01-083-3681 · 4520010833681 · NIIN 010833681 · 01-083-3681 · FSC 4520 Space and Water Heating Equipment · 74077-1 · 74077-1 · 74077-1

Nearby stock numbers ← 4520-01-083-3459 Connector Plate, Male · 4520-01-083-4105 Heating Element, Electrical, Immer →

Features

Damper,flue — FSC 4520
FSC Application Data: HEATER,TRAILER MOUNTED,HDU-13M
Overall Thickness: 0.051 INCHES NOMINAL IN
Shape: SQUARE
Material: ALUMINUM

Identification

NSN: 4520-01-083-3681
NIIN: 010833681
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal

General Description

The Damper,flue, cataloged under National Stock Number 4520-01-083-3681, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4520-01-083-3681
Item Name	Damper,flue
FSC / FSG	4520 / 45 — Space and Water Heating Equipment
Status	ACTIVE
FSC Application Data	HEATER,TRAILER MOUNTED,HDU-13M
Overall Thickness	0.051 INCHES NOMINAL IN
Shape	SQUARE
Material	ALUMINUM

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
74077-1	5/9 Secondary reference Drs Environmental Systems Inc
74077-1	5/2 Secondary reference U.S. Government activity
74077-1	3/9 Design control — primary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 4520 — Space and Water Heating Equipment

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

4520-00-000-0098

HEATING ELEMENT,ELECTRICAL,NONIM

4520-00-000-0099

4520-00-000-0099 · Item name not on file

4520-00-001-1240

4520-00-001-1240 · Item name not on file

4520-00-001-3518

HEATING ELEMENT,ELECTRICAL,NONIM

4520-00-001-3519

HEATING ELEMENT,ELECTRICAL,IMMER

4520-00-001-6052

HEATING ELEMENT,ELECTRICAL,NONIM

4520-00-001-6298

HEATING ELEMENT,ELECTRICAL,NONIM

4520-00-001-7726

HEATER,DUCT TYPE,PORTABLE

Frequently Asked Questions

What is NSN 4520-01-083-3681?

NSN 4520-01-083-3681 is a Damper,flue, classified under FSC 4520, Space and Water Heating Equipment. Status: active.

What are the specifications of 4520-01-083-3681?

Key specifications for 4520-01-083-3681: Overall Height: 9.437 INCHES NOMINAL IN; FSC Application Data: HEATER,TRAILER MOUNTED,HDU-13M; Overall Thickness: 0.051 INCHES NOMINAL IN; Shape: SQUARE. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4520-01-083-3681 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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