The Valve,hydraulic Oil Reservoir, cataloged under National Stock Number 4820-00-181-8979, 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. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-181-8979 |
| Item Name | Valve,hydraulic Oil Reservoir |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY 114HS136 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 114HS136 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 118600-1 | 3/3 Design control — primary reference U.S. Government activity |
NSN 4820-00-181-8979 is a Valve,hydraulic Oil Reservoir, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-181-8979 has 1 manufacturer part number on file: 114HS136 (The Boeing Company).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-181-8994. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-181-8979: Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY 114HS136. 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.