The Disk,valve, cataloged under National Stock Number 4820-01-232-8461, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-232-8461 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | SWING CHECK |
| Inside Diameter | 0.881 INCHES NOMINAL IN |
| Media for Which Designed | AIR |
| Material | TIN AND COPPER ALLOY |
| 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 |
|---|---|
| 6002-95 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6002-95 ITEM 13 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4457059 | D/9 Drawing number reference only U.S. Government activity |
| 4457059 ITEM 13 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-232-8461 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-232-8462, 4820-01-233-3523. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-232-8461: Style Designator: SWING CHECK; Inside Diameter: 0.881 INCHES NOMINAL IN; Media for Which Designed: AIR; End Item Identification: SSN688 CLASS SUBMARINE MBT VENT VALVE. 4 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.