Muffler, Exhaust2990-01-077-4711

NSN 2990-01-077-4711 · NIIN 010774711

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

Government record, cited

Also searched as 2990-01-077-4711 · 2990010774711 · NIIN 010774711 · 01-077-4711 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · 8455270 · EP-4-44-M02 · 3304386-2

Nearby stock numbers ← 2990-01-077-4465 Blanket, Turbocharge · 2990-01-077-5533 Governor, Emergency →

Features

Muffler,exhaust — FSC 2990
Body Shape: RECTANGULAR
Test Data Document: 99251-3304386-2 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)

Identification

NSN: 2990-01-077-4711
NIIN: 010774711
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories

General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-01-077-4711, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	2990-01-077-4711
Item Name	Muffler,exhaust
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Status	ACTIVE
Body Shape	RECTANGULAR
Test Data Document	99251-3304386-2 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)

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
8455270	7/2 Vendor item drawing reference Us Army Aviation and Missile Command
EP-4-44-M02	3/2 Design control — primary reference U.S. Government activity
3304386-2	5/9 Secondary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft

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

2990-00-001-0001

BLOWER ASSEMBLY

2990-00-001-1248

2990-00-001-1248 · Item name not on file

2990-00-001-1250

2990-00-001-1250 · Item name not on file

2990-00-001-2055

2990-00-001-2055 · Item name not on file

2990-00-001-3498

2990-00-001-3498 · Item name not on file

2990-00-001-3520

2990-00-001-3520 · Item name not on file

2990-00-001-3521

2990-00-001-3521 · Item name not on file

2990-00-001-3522

CAP ASSEMBLY,MUFFLE

Frequently Asked Questions

What is NSN 2990-01-077-4711?

NSN 2990-01-077-4711 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What are the specifications of 2990-01-077-4711?

Key specifications for 2990-01-077-4711: Overall Length: 4.000 INCHES NOMINAL IN; Overall Width: 1.870 INCHES NOMINAL IN; Body Shape: RECTANGULAR; Special Features: FLOW RATE 25 SCFM AT 4 PSIG AND 50 SCFM AT 50 PSIG. 2 specifications are documented in the U.S. Government catalog.

Is NSN 2990-01-077-4711 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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