The Pneumatic Muffler,exhaust-Intake, cataloged under National Stock Number 4330-01-323-6031, 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 Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-323-6031 |
| Primary Part Number | 43551-2 |
| Item Name | Pneumatic Muffler,exhaust-Intake |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division |
| Status | ACTIVE |
| Outlet Connection Quantity | 1 |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 1.000 INCHES NOMINAL IN |
| Inlet Connection Quantity | 1 |
| Muffler Design | STRAIGHT THROUGH |
| Body Shape | ROUND |
| Material | ALUMINUM LOCATION NOT OTHERWISE SPECIFIED |
| 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 |
|---|---|
| 43551-2 | Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division (USA) |
| Reference | Meaning |
|---|---|
| 43551-2 | 3/9 Design control — primary reference Ingersoll-Rand Company Dba Ingersoll-Rand |
NSN 4330-01-323-6031 is a Pneumatic Muffler,exhaust-Intake, manufactured by Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-323-6031 has 1 manufacturer part number on file: 43551-2 (Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division).
Key specifications for 43551-2: Outlet Connection Quantity: 1; Coolant Type: AIR; Design Type: DRY; Overall Diameter: 1.000 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
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.