PartsTable TECHNICAL DATA SHEET

NSN 2990-01-438-5300Government record, cited

Muffler, Exhaust2990-01-438-5300

NSN 2990-01-438-5300 · NIIN 014385300

FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories

Government record, cited

Also searched as 2990-01-438-5300 · 2990014385300 · NIIN 014385300 · 01-438-5300 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · 1664168 · 24779-A

Nearby stock numbers ← 2990-01-438-4541 Sensor, Crankshaft Position, Emiss · 2990-01-438-6767 Pipe, Exhaust →

Features

Muffler,exhaust — FSC 2990

Identification

NSN: 2990-01-438-5300
NIIN: 014385300
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories

General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-01-438-5300, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Muffler,exhaust
FSC / FSG	2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29)

Technical Specifications

Parameter	Value
NSN	2990-01-438-5300
Item Name	Muffler,exhaust
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Status	ACTIVE

Lifecycle & Compliance

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

⇄ Related Items 5

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

5330-01-646-86841648679-1 POSSIBLE MATCH

GASKET

Possible match (shared part number)Mission Systems Davenport Inc.

5330-01-646-86871649035-1 POSSIBLE MATCH

GASKET

Possible match (shared part number)Mission Systems Davenport Inc.

5340-01-647-80031657956-1 POSSIBLE MATCH

STANDOFF,THREADED,SPACING

Possible match (shared part number)Mission Systems Davenport Inc.

5340-01-647-80101650139-1 POSSIBLE MATCH

STANDOFF,THREADED,SPACING

Possible match (shared part number)Mission Systems Davenport Inc.

5310-01-647-97641658021-1 POSSIBLE MATCH

NUT,BLIND ASSEMBLY

Possible match (shared part number)Mission Systems Davenport Inc.

Cross-Reference Index

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

Reference documents

Reference	Meaning
1664168	3/2 Design control — primary reference U.S. Government activity
24779-A	C/1 Advisory reference — outside the item-of-supply concept Nelson Industries Inc Nelson Muffler Div

Related Parts

5330-01-646-8684POSSIBLE MATCH

GASKET

1648679-1

5330-01-646-8687POSSIBLE MATCH

GASKET

1649035-1

5340-01-647-8003POSSIBLE MATCH

STANDOFF,THREADED,SPACING

1657956-1

5340-01-647-8010POSSIBLE MATCH

STANDOFF,THREADED,SPACING

1650139-1

5310-01-647-9764POSSIBLE MATCH

NUT,BLIND ASSEMBLY

1658021-1

Frequently Asked Questions

What is NSN 2990-01-438-5300?

NSN 2990-01-438-5300 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What NSN replaces 2990-01-438-5300?

5 possible matches (shared part number, not a government interchangeability claim): 5330-01-646-8684, 5330-01-646-8687, 5340-01-647-8003. Verify interchangeability with system specifications before substitution.

Is NSN 2990-01-438-5300 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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