The Seat,valve, cataloged under National Stock Number 4820-01-681-9573, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Exidyne Instrumentation Technologies Inc. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Seat,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Exidyne Instrumentation Technologies Inc (CAGE 62766) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-681-9573 |
| Primary Part Number | D0009-0004 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Exidyne Instrumentation Technologies Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| D0009-0004 PRIMARY | Exidyne Instrumentation Technologies Inc (USA) |
| MARB3 REV- ITEM 6 | Exidyne Instrumentation Technologies Inc (USA) |
| MARB3/SHEET 1 | Exidyne Instrumentation Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| MARB3 | D/9 Drawing number reference only Exidyne Instrumentation Technologies Inc |
NSN 4820-01-681-9573 is a Seat,valve, manufactured by Exidyne Instrumentation Technologies Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-681-9573 has 3 manufacturer part numbers on file: D0009-0004 (Exidyne Instrumentation Technologies Inc), MARB3 REV- ITEM 6 (Exidyne Instrumentation Technologies Inc), MARB3/SHEET 1 (Exidyne Instrumentation Technologies Inc).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-682-4938. Verify interchangeability with system specifications before substitution.
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.