Muffler, Exhaust2990-01-407-3664

NSN 2990-01-407-3664 · NIIN 014073664 · Part number 22281

Walker Mfg Co · FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories · CAGE 79260

Government record, cited

NSN 2990-01-407-3664 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-407-3664. Manufacturer of record part number: 22281.

Also searched as 2990-01-407-3664 · 2990014073664 · NIIN 014073664 · 01-407-3664 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 79260 · 22281

Nearby stock numbers ← 2990-01-407-3575 Pipe, Exhaust · 2990-01-407-5141 Muffler, Exhaust →

Features

Muffler,exhaust — FSC 2990
Operating Position: HORIZONTAL
Inlet Connection Type: UNTHREADED SINGLE INLET
Body Shape: ROUND
2 manufacturer part numbers on file
Manufacturer of record: Walker Mfg Co

Identification

NSN: 2990-01-407-3664
NIIN: 014073664
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: 22281
Manufacturer: Walker Mfg Co

General Description

The Muffler,exhaust, cataloged under National Stock Number 2990-01-407-3664, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Walker Mfg Co. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-01-407-3664
Primary Part Number	22281
Item Name	Muffler,exhaust
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Manufacturer	Walker Mfg Co
Status	ACTIVE
Operating Position	HORIZONTAL
Inlet Connection Type	UNTHREADED SINGLE INLET
Body Shape	ROUND

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
22281 PRIMARY	Walker Mfg Co (USA)
22281	Bamforth Automotive Inc (USA)

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 2990-01-407-3664?

NSN 2990-01-407-3664 is a Muffler,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-01-407-3664?

NSN 2990-01-407-3664 has 2 manufacturer part numbers on file: 22281 (Walker Mfg Co), 22281 (Bamforth Automotive Inc).

What are the specifications of 22281?

Key specifications for 22281: Operating Position: HORIZONTAL; Inlet Connection Type: UNTHREADED SINGLE INLET; Body Shape: ROUND; Special Features: RESONATOR. 3 specifications are documented in the U.S. Government catalog.

Is NSN 2990-01-407-3664 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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