Muffler, Exhaust2990-01-565-4644

NSN 2990-01-565-4644 · NIIN 015654644 · Part number 204-7401

Caterpillar Inc Div Caterpillar Defense · FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories · CAGE 11083

Government record, cited

NSN 2990-01-565-4644 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-565-4644. Manufacturer of record part number: 204-7401.

Also searched as 2990-01-565-4644 · 2990015654644 · NIIN 015654644 · 01-565-4644 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 11083 · 204-7401

Nearby stock numbers ← 2990-01-565-4355 Manifold, Intake · 2990-01-565-4657 Pipe, Exhaust →

Features

Muffler,exhaust — FSC 2990
Operating Position: HORIZONTAL
Inlet Connection Type: UNTHREADED SINGLE INLET
Body Shape: ROUND
Outlet Connection Type: UNTHREADED FIRST OUTLET
1 manufacturer part number on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 2990-01-565-4644
NIIN: 015654644
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: 204-7401
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-01-565-4644, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-01-565-4644
Primary Part Number	204-7401
Item Name	Muffler,exhaust
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Manufacturer	Caterpillar Inc Div Caterpillar Defense
Status	ACTIVE
Operating Position	HORIZONTAL
Inlet Connection Type	UNTHREADED SINGLE INLET
Body Shape	ROUND
Outlet Connection Type	UNTHREADED FIRST OUTLET

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

Part Number	Manufacturer
204-7401 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)

Frequently Asked Questions

What is NSN 2990-01-565-4644?

NSN 2990-01-565-4644 is a Muffler,exhaust, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-01-565-4644?

NSN 2990-01-565-4644 has 1 manufacturer part number on file: 204-7401 (Caterpillar Inc Div Caterpillar Defense).

What are the specifications of 204-7401?

Key specifications for 204-7401: Operating Position: HORIZONTAL; Inlet Connection Type: UNTHREADED SINGLE INLET; Body Shape: ROUND; Part Name Assigned by Controlling Agency: MUFFLER. 4 specifications are documented in the U.S. Government catalog.

Is NSN 2990-01-565-4644 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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