The Stem,fluid Valve, cataloged under National Stock Number 4820-01-340-0430, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Schneider Electric Systems Usa Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-340-0430 |
| Primary Part Number | 82161-S ASSY 82161-S21 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Schneider Electric Systems Usa Inc |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 POPPET AND 2 RETAINER AND 2 RING AND 4 SCREW |
| Valve Type for Which Designed | REGULATOR |
| Valve Size for Which Designed | 3.000 INCHES IN |
| 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 |
|---|---|
| 82161-S21 | Schneider Electric Systems Usa Inc (USA) |
| 82161-S ASSY 82161-S21 PRIMARY | Schneider Electric Systems Usa Inc (USA) |
| Reference | Meaning |
|---|---|
| 82161-S | D/9 Drawing number reference only Schneider Electric Systems Usa Inc |
NSN 4820-01-340-0430 is a Stem,fluid Valve, manufactured by Schneider Electric Systems Usa Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-340-0430 has 2 manufacturer part numbers on file: 82161-S21 (Schneider Electric Systems Usa Inc), 82161-S ASSY 82161-S21 (Schneider Electric Systems Usa Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-340-8830. Verify interchangeability with system specifications before substitution.
Key specifications for 82161-S ASSY 82161-S21: Furnished Items and Quantity: 1 POPPET AND 2 RETAINER AND 2 RING AND 4 SCREW; Valve Type for Which Designed: REGULATOR; Valve Size for Which Designed: 3.000 INCHES IN. 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.