The Pneumatic Muffler,exhaust-Intake, cataloged under National Stock Number 4330-01-189-3347, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Pneumatic Muffler,exhaust-Intake |
| FSC / FSG | 4330 — Centrifugals, Separators, and Pressure and Vacuum Filters (FSG 43) |
| Manufacturers | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (CAGE 8FGX3); Industrial Filter Manufacturers Inc Div Ifm Inc. (CAGE 64756) |
| Parameter | Value |
|---|---|
| NSN | 4330-01-189-3347 |
| Primary Part Number | W122999 |
| Item Name | Pneumatic Muffler,exhaust-Intake |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| W122999 | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| AFS035-02 | Industrial Filter Manufacturers Inc Div Ifm Inc. (USA) |
| Reference | Meaning |
|---|---|
| A1-112-35 | 5/9 Secondary reference Dollinger Corp |
| AI-162-35020 | C/1 Advisory reference — outside the item-of-supply concept Dollinger Corp |
| W122999 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| G7672A PC 1 | 5/9 Secondary reference U.S. Government activity |
| A1-262-35-020 | 3/9 Design control — primary reference Dollinger Corp |
| G7672A PC 1 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| W122999 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 4330-01-189-3347 is a Pneumatic Muffler,exhaust-Intake, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-189-3347 has 2 manufacturer part numbers on file: W122999 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions), AFS035-02 (Industrial Filter Manufacturers Inc Div Ifm Inc.).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.