The Seat,valve, cataloged under National Stock Number 4820-00-441-5090, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Portland Valve Llc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 5 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 | 4820-00-441-5090 |
| Primary Part Number | 0-249EPC3 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Portland Valve Llc |
| Status | ACTIVE |
| Body Outside Diameter | 0.750 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.188 INCHES NOMINAL IN |
| Material | PLASTIC OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 0-250EPC3 | Portland Valve Llc (USA) |
| 0-249EPC3 PRIMARY | Portland Valve Llc (USA) |
| D0479PC3 PRIMARY | Portland Valve Llc (USA) |
| 002-0055-00 PRIMARY | Portland Valve Llc (USA) |
| 002-0055-58 PRIMARY | Portland Valve Llc (USA) |
NSN 4820-00-441-5090 is a Seat,valve, manufactured by Portland Valve Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-441-5090 has 5 manufacturer part numbers on file: 0-250EPC3 (Portland Valve Llc), 0-249EPC3 (Portland Valve Llc), D0479PC3 (Portland Valve Llc), 002-0055-00 (Portland Valve Llc), 002-0055-58 (Portland Valve Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-325-8131. Verify interchangeability with system specifications before substitution.
Key specifications for 0-249EPC3: Overall Height: 0.438 INCHES NOMINAL IN; Body Outside Diameter: 0.750 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 0.188 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.