The Seat,valve, cataloged under National Stock Number 4820-00-394-7797, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Union Carbide Corp Sub of Dow Co the. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4820-00-394-7797 |
| Primary Part Number | A250122PC9 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Union Carbide Corp Sub of Dow Co the |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.563 INCHES NOMINAL IN |
| Flange Diameter | 1.750 INCHES NOMINAL IN |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 0.438 INCHES NOMINAL IN |
| Under Flange Height | 0.656 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.000 NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| A250122PC9 PRIMARY | Union Carbide Corp Sub of Dow Co the (USA) |
| D252811SH1PC9 PRIMARY | Union Carbide Corp Sub of Dow Co the (USA) |
| 250217 PRIMARY | Union Carbide Corp Sub of Dow Co the (USA) |
NSN 4820-00-394-7797 is a Seat,valve, manufactured by Union Carbide Corp Sub of Dow Co the, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-394-7797 has 3 manufacturer part numbers on file: A250122PC9 (Union Carbide Corp Sub of Dow Co the), D252811SH1PC9 (Union Carbide Corp Sub of Dow Co the), 250217 (Union Carbide Corp Sub of Dow Co the).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-114-0399. Verify interchangeability with system specifications before substitution.
Key specifications for A250122PC9: Flange Seat to Disk End Height: 0.563 INCHES NOMINAL IN; Flange Diameter: 1.750 INCHES NOMINAL IN; Style Designator: THREADED FLANGED; Body Inside Diameter: 0.438 INCHES NOMINAL IN. 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.