The Seat,valve, cataloged under National Stock Number 4820-00-591-7096, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Drs Environmental Systems Inc. Government technical data includes 6 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-591-7096 |
| Primary Part Number | 207203 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Drs Environmental Systems Inc |
| Status | ACTIVE |
| FSC Application Data | VALVE,REGULATING,HYDRAULIC SYSTEM,AIRCRAFT |
| Body Outside Diameter | 0.672 INCHES MINIMUM AND 0.674 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.317 INCHES MINIMUM AND 0.319 INCHES MAXIMUM IN |
| Material | PLASTIC POLYURETHANE OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 207203 PRIMARY | Drs Environmental Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 207203 | 5/9 Secondary reference Kidde-Fenwal, Llc |
| 207203 | 5/9 Secondary reference U.S. Government activity |
| 207203 | 3/9 Design control — primary reference Davey Compressor Co Div of Keco Industries Inc |
NSN 4820-00-591-7096 is a Seat,valve, manufactured by Drs Environmental Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-591-7096 has 1 manufacturer part number on file: 207203 (Drs Environmental Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 6145-01-561-4653. Verify interchangeability with system specifications before substitution.
Key specifications for 207203: Overall Height: 0.131 INCHES NOMINAL IN; FSC Application Data: VALVE,REGULATING,HYDRAULIC SYSTEM,AIRCRAFT; Body Outside Diameter: 0.672 INCHES MINIMUM AND 0.674 INCHES MAXIMUM IN; Style Designator: PLAIN. 6 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.