The Overflow Valve, cataloged under National Stock Number 4820-01-421-8525, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-8525 |
| Item Name | Overflow 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 |
|---|---|
| 518958PC26 | C/1 Advisory reference — outside the item-of-supply concept Fuji Trading America Inc |
| 518958PC26 | 3/9 Design control — primary reference Kamewa |
| 518958PC26 | C/1 Advisory reference — outside the item-of-supply concept Kamewa Usa Inc |
| 518958PC26 | 5/9 Secondary reference Rolls-Royce Ab |
NSN 4820-01-421-8525 is a Overflow Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-421-8525: End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 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.