Pipe, Air Conditioning-Heating4520-01-185-9074

NSN 4520-01-185-9074 · NIIN 011859074

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

Government record, cited

Also searched as 4520-01-185-9074 · 4520011859074 · NIIN 011859074 · 01-185-9074 · FSC 4520 Space and Water Heating Equipment

Nearby stock numbers ← 4520-01-185-6224 Plate, Mounting, Float Chamber · 4520-01-185-9255 Heating Element, Electrical, Nonimmersion Type →

Features

Pipe,air Conditioning-Heating — FSC 4520
Length: 26.688 INCHES NOMINAL IN
Shape: ROUND
Construction: SINGLE
Material: STEEL
Cross-Sectional Diameter: 13.5718 INCHES MINIMUM AND 13.6178 INCHES MAXIMUM IN
Material Thickness: 0.0359 INCHES IN

Identification

NSN: 4520-01-185-9074
NIIN: 011859074
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal

General Description

The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-01-185-9074, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4520-01-185-9074
Item Name	Pipe,air Conditioning-Heating
FSC / FSG	4520 / 45 — Space and Water Heating Equipment
Status	ACTIVE
Length	26.688 INCHES NOMINAL IN
Shape	ROUND
Construction	SINGLE
Material	STEEL
Cross-Sectional Diameter	13.5718 INCHES MINIMUM AND 13.6178 INCHES MAXIMUM IN
Material Thickness	0.0359 INCHES IN

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
D31-15-1445	3/2 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 4520-01-185-9074?

NSN 4520-01-185-9074 is a Pipe,air Conditioning-Heating, classified under FSC 4520, Space and Water Heating Equipment. Status: active.

What are the specifications of 4520-01-185-9074?

Key specifications for 4520-01-185-9074: Length: 26.688 INCHES NOMINAL IN; Shape: ROUND; Construction: SINGLE; End Item Identification: M3A4 SMOKE GENERATOR. 6 specifications are documented in the U.S. Government catalog.

Is NSN 4520-01-185-9074 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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