The Seat,valve, cataloged under National Stock Number 4820-00-784-4679, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-784-4679 |
| Primary Part Number | 400483 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| FSC Application Data | OIL FILTER VALVE,ACFT ENGINE |
| Seal Accommodation Type | GROOVED |
| Taper Minor Diameter | 0.795 INCHES MINIMUM AND 0.805 INCHES MAXIMUM IN |
| Body Inside Diameter | 0.491 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN |
| Taper Length | 0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN |
| Material | PLASTIC 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 |
NSN 4820-00-784-4679 is a Seat,valve, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-784-4679 has 2 manufacturer part numbers on file: 400483 (Insulfab Plastics Inc), 400483 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5815-01-066-7318. Verify interchangeability with system specifications before substitution.
Key specifications for 400483: FSC Application Data: OIL FILTER VALVE,ACFT ENGINE; Seal Accommodation Type: GROOVED; Taper Minor Diameter: 0.795 INCHES MINIMUM AND 0.805 INCHES MAXIMUM IN; Body Inside Diameter: 0.491 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN. 7 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.