The Disk,valve, cataloged under National Stock Number 4820-01-503-6561, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-503-6561 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 9447-00-0600-49 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 9447-00-0000-500 PCS 4, 6, 16 | 5/2 Secondary reference U.S. Government activity |
| 9447-00-0000-500 | D/9 Drawing number reference only U.S. Government activity |
| 9447-00-0600-495 W/DICS LIMITERS | 3/2 Design control — primary reference U.S. Government activity |
| 9447-00-0000-500 | 5/9 Secondary reference U.S. Government activity |
| 9447-00-0000-500 PCS 4, 6, 16 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-503-6561 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-503-6561: Part Name Assigned by Controlling Agency: ELEMENT WITH DISC LIMITERS; End Item Identification: VENTILATION SILENCER (ABVS) AFT/FWD. 0 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.