The Disk,valve, cataloged under National Stock Number 4820-01-504-5613, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-504-5613 |
| Primary Part Number | 3491AS0804-1 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Criticality Code Justification | AGAV |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 3491AS0804-1 | Pre-Mach Inc (USA) |
| 3491AS0804-1 | Duhadaway Tool & Die Shop Inc (USA) |
| 3491AS0804-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 3491AS0804-1 | 5/9 Secondary reference Computa-Base-Machining, Inc. |
| 3491AS0804-1 | 5/9 Secondary reference Indal Technologies Inc |
NSN 4820-01-504-5613 is a Disk,valve, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-504-5613 has 3 manufacturer part numbers on file: 3491AS0804-1 (Pre-Mach Inc), 3491AS0804-1 (Duhadaway Tool & Die Shop Inc), 3491AS0804-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 3491AS0804-1: Criticality Code Justification: AGAV; Part Name Assigned by Controlling Agency: (INAVY) FLAPPER FOR CONTROL VALVE SHEAVE DAMPER; End Item Identification: SHEAVE DAMPER ASSY; Material: STEEL. 2 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 4820-01-504-5613 has DEMIL Code D. 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.