The Gear Operator,valve, cataloged under National Stock Number 4820-01-398-8461, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-398-8461 |
| Primary Part Number | 211040691 |
| Item Name | Gear Operator,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Valve Type for Which Designed | GATE |
| Valve Size for Which Designed | 0.250 INCHES IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 211040691 PRIMARY | Naval Sea Systems Command (USA) |
| 801-6404994-AY91 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| PLC-11403 | D/9 Drawing number reference only U.S. Government activity |
| PLC-11403 PC 22-99 | 5/2 Secondary reference U.S. Government activity |
| PLC-11403 PIECE 22 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-398-8461 is a Gear Operator,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-398-8461 has 2 manufacturer part numbers on file: 211040691 (Naval Sea Systems Command), 801-6404994-AY91 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-442-3955, 4820-01-500-8747. Verify interchangeability with system specifications before substitution.
Key specifications for 211040691: Valve Type for Which Designed: GATE; Valve Size for Which Designed: 0.250 INCHES IN; Material: STEEL CORROSION RESISTING. 3 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.