The Valve,check, cataloged under National Stock Number 4820-01-509-6399, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rogers Machinery Company Inc Div Corporate Branch. Government technical data includes 11 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-509-6399 |
| Primary Part Number | T4009 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rogers Machinery Company Inc Div Corporate Branch |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 2.000 INCHES ALL ENDS IN |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Disk Loading Method | SPRING |
| Media for Which Designed | AIR FIRST RESPONSE |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Material | ALUMINUM BODY |
| Opening Pressure Setting | 1.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| T4009 PRIMARY | Rogers Machinery Company Inc Div Corporate Branch (USA) |
NSN 4820-01-509-6399 is a Valve,check, manufactured by Rogers Machinery Company Inc Div Corporate Branch, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-509-6399 has 1 manufacturer part number on file: T4009 (Rogers Machinery Company Inc Div Corporate Branch).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-697-5697. Verify interchangeability with system specifications before substitution.
Key specifications for T4009: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 2.000 INCHES ALL ENDS IN; Connection Style: PLAIN (PIPE) ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDS. 11 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.