Extension, Heater Exhaust4520-01-003-1475

NSN 4520-01-003-1475 · NIIN 010031475

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

Government record, cited

Also searched as 4520-01-003-1475 · 4520010031475 · NIIN 010031475 · 01-003-1475 · FSC 4520 Space and Water Heating Equipment · TRF3120 · TRF3120 · TRF3120

Nearby stock numbers ← 4520-01-003-1474 Drain Tube, Heat Exchanger · 4520-01-003-1476 Hose Assembly, Heater →

Features

Extension,heater Exhaust — FSC 4520
General Characteristics Item Description: CARBON STEEL

Identification

NSN: 4520-01-003-1475
NIIN: 010031475
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal

General Description

The Extension,heater Exhaust, cataloged under National Stock Number 4520-01-003-1475, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	4520-01-003-1475
Item Name	Extension,heater Exhaust
FSC / FSG	4520 / 45 — Space and Water Heating Equipment
Status	ACTIVE
General Characteristics Item Description	CARBON STEEL

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
TRF3120	3/9 Design control — primary reference U.S. Government activity
TRF3120	5/9 Secondary reference Drs Environmental Systems Inc
TRF3120	5/2 Secondary 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 4520-01-003-1475?

NSN 4520-01-003-1475 is a Extension,heater Exhaust, classified under FSC 4520, Space and Water Heating Equipment. Status: active.

What are the specifications of 4520-01-003-1475?

Key specifications for 4520-01-003-1475: General Characteristics Item Description: CARBON STEEL; End Item Identification: HEATER,BT400&43 TYPE H&1. 1 specification is documented in the U.S. Government catalog.

Is NSN 4520-01-003-1475 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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