The Disk,valve, cataloged under National Stock Number 4820-01-296-4852, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-296-4852 |
| Primary Part Number | 7M640-56 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Pressure Rating | 0.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 60.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Media for Which Designed | FUEL, JET |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7M640-56 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 56C112-3 | 3/2 Design control — primary reference U.S. Government activity |
| 56C112-3-1 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-296-4852 is a Disk,valve, manufactured by The Boeing Company Div Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-296-4852 has 1 manufacturer part number on file: 7M640-56 (The Boeing Company Div Defense).
Key specifications for 7M640-56: Pressure Rating: 0.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 60.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Special Features: VALVE ELEMENT-SWING CHECK,FUEL; Media for Which Designed: FUEL, JET; Material: ALUMINUM ALLOY. 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.
NSN 4820-01-296-4852 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.