The Seat,valve, cataloged under National Stock Number 4820-00-346-9262, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-346-9262 |
| Primary Part Number | 144355P40 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| FSC Application Data | ACFT ENG R2800 |
| Body Outside Diameter | 2.860 INCHES NOMINAL IN |
| Hardness Rating | 90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM OVERALL |
| Style Designator | PLAIN |
| Body Inside Diameter | 2.276 INCHES MINIMUM AND 2.286 INCHES MAXIMUM IN |
| Material | STEEL 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 |
|---|---|
| 144355P40 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 144355P40 | 5/9 Secondary reference Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. |
| AS144355P40 | 5/9 Secondary reference Aircraft Supplies |
NSN 4820-00-346-9262 is a Seat,valve, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-346-9262 has 1 manufacturer part number on file: 144355P40 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 144355P40: Overall Height: 0.572 INCHES MINIMUM AND 0.582 INCHES MAXIMUM IN; FSC Application Data: ACFT ENG R2800; Body Outside Diameter: 2.860 INCHES NOMINAL IN; Hardness Rating: 90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM OVERALL. 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.