The Pneumatic Muffler,exhaust-Intake, cataloged under National Stock Number 4310-01-427-9303, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Welch Vacuum Technology Inc. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-427-9303 |
| Primary Part Number | 1417Y |
| Item Name | Pneumatic Muffler,exhaust-Intake |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Welch Vacuum Technology Inc |
| Status | ACTIVE |
| Inlet Flange Shape | ROUND LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Quantity | 1 |
| Inlet Location | LOCATED IN END SECTION PERPENDICULAR TO BODY |
| Design Type | DRY |
| Overall Diameter | 4.380 INCHES NOMINAL IN |
| Inlet Connection Quantity | 1 |
| Muffler Design | STRAIGHT THROUGH |
| Outlet Flange Shape | ROUND LOCATION NOT OTHERWISE SPECIFIED |
| Inlet Connection Type | FLANGE LOCATION NOT OTHERWISE SPECIFIED |
| Body Shape | ROUND |
| Material | IRON CAST AND STEEL CORROSION RESISTING LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Type | FLANGE LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Location | LOCATED IN END SECTION 180.0 DEG FROM INLET |
| 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 |
|---|---|
| 1417Y PRIMARY | Welch Vacuum Technology Inc (USA) |
NSN 4310-01-427-9303 is a Pneumatic Muffler,exhaust-Intake, manufactured by Welch Vacuum Technology Inc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-427-9303 has 1 manufacturer part number on file: 1417Y (Welch Vacuum Technology Inc).
Key specifications for 1417Y: Inlet Flange Shape: ROUND LOCATION NOT OTHERWISE SPECIFIED; Outlet Connection Quantity: 1; Inlet Location: LOCATED IN END SECTION PERPENDICULAR TO BODY; Design Type: DRY. 13 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.