The Pneumatic Muffler,exhaust-Intake, cataloged under National Stock Number 4330-01-151-3978, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-151-3978 |
| Item Name | Pneumatic Muffler,exhaust-Intake |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Status | ACTIVE |
| Inlet Location | CENTRALLY LOCATED ON END CAP |
| Overall Diameter | 3.875 INCHES NOMINAL IN |
| Inlet Connection Quantity | 1 |
| Inlet Thread Location | EXTERNAL LOCATION NOT OTHERWISE SPECIFIED |
| Inlet Projection Length | 0.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Muffler Design | STRAIGHT THROUGH |
| Inlet Connection Type | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Thread Direction | RIGHT-HAND INLET |
| Body Shape | ROUND |
| Inlet Thread Size | 1.000-11-1/2 LOCATION NOT OTHERWISE SPECIFIED |
| Inlet Thread Series Designator | NPT LOCATION NOT OTHERWISE SPECIFIED |
| Material | ALUMINUM AND PLASTIC PHENOLIC 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 |
| Reference | Meaning |
|---|---|
| 0111010 | 3/2 Design control — primary reference U.S. Government activity |
| M10 | 5/2 Secondary reference U.S. Government activity |
NSN 4330-01-151-3978 is a Pneumatic Muffler,exhaust-Intake, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
Key specifications for 4330-01-151-3978: Inlet Location: CENTRALLY LOCATED ON END CAP; Overall Diameter: 3.875 INCHES NOMINAL IN; Inlet Connection Quantity: 1; Inlet Thread Location: EXTERNAL LOCATION NOT OTHERWISE SPECIFIED. 12 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.