The Disk,valve, cataloged under National Stock Number 4820-01-426-0286, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-426-0286 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Media for Which Designed | HYDRAULIC FLUID |
| 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 |
|---|---|
| 17720233A 80MM | 5/9 Secondary reference Halla Hydro Ab |
| 17720233 | D/9 Drawing number reference only Halla Hydro Ab |
| 17720233 80MM AH IT5 | 3/9 Design control — primary reference Halla Hydro Ab |
| 17720233 80MM AH IT5 | 5/9 Secondary reference Seffle Marine Ltd |
NSN 4820-01-426-0286 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-426-2374, 4820-01-426-2388, 4820-01-439-1888. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-426-0286: Media for Which Designed: HYDRAULIC FLUID; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 1 specification is 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.