The Valve,stop-Check, cataloged under National Stock Number 4820-01-397-2301, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-397-2301 |
| Primary Part Number | 3 INCH C303 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division |
| Status | ACTIVE |
| Style Designator | ANGLE FLANGED ENDS |
| Material | STEEL BODY |
| Material | STEEL CORROSION RESISTING STEM |
| 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 |
|---|---|
| 3 INCH C303 PRIMARY | Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division (USA) |
| 303-106406 | Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division (USA) |
| Reference | Meaning |
|---|---|
| MODEL 303-106406 | 5/9 Secondary reference Vogt Edward Valve Co a British Tire & Rubber Co |
| D-106406-3IN | 5/9 Secondary reference Vogt Edward Valve Co a British Tire & Rubber Co |
NSN 4820-01-397-2301 is a Valve,stop-Check, manufactured by Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-397-2301 has 2 manufacturer part numbers on file: 3 INCH C303 (Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division), 303-106406 (Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division).
Key specifications for 3 INCH C303: Style Designator: ANGLE FLANGED ENDS; Special Features: FLANGED 3IN WITH FLANGED BONNET IN; Material: STEEL BODY; Material: STEEL CORROSION RESISTING STEM. 3 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.