The Pneumatic Muffler,exhaust-Intake, cataloged under National Stock Number 4310-01-503-8742, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd. Government technical data includes 6 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 | 4310-01-503-8742 |
| Primary Part Number | 4D98757H70 |
| Item Name | Pneumatic Muffler,exhaust-Intake |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd |
| Status | ACTIVE |
| Design Type | DRY |
| Muffler Design | LOUVER |
| Body Shape | RECTANGULAR |
| Functional Description | USED ON THE 4D98757 UPPER HOUSING ASSEMBLY |
| Material | GLASS FIBER INSULATION |
| Material | STEEL CORROSION RESISTING AND GLASS 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 |
|---|---|
| 4D98757H70 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd (USA) |
NSN 4310-01-503-8742 is a Pneumatic Muffler,exhaust-Intake, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-503-8742 has 1 manufacturer part number on file: 4D98757H70 (Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd).
Key specifications for 4D98757H70: Overall Height: 6.000 INCHES NOMINAL IN; Design Type: DRY; Overall Length: 13.340 INCHES NOMINAL IN; Overall Width: 13.340 INCHES NOMINAL IN. 6 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.