The Seat,valve, cataloged under National Stock Number 4820-00-337-7129, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 8 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-337-7129 |
| Primary Part Number | 1429338 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.375 INCHES NOMINAL IN |
| Flange Diameter | 2.584 INCHES MINIMUM AND 2.604 INCHES MAXIMUM IN |
| Body Outside Diameter | 2.129 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 1.688 INCHES NOMINAL IN |
| Seat Radius | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Under Flange Height | 2.375 INCHES NOMINAL IN |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 1429338 | Westinghouse Electric Corp (USA) |
| 17E637PC22 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 1429338 | 5/2 Secondary reference U.S. Government activity |
| 40J278PC22 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 17E637PC22 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 40J278PC22 | 5/9 Secondary reference Westinghouse Electric Corp |
| 1429338 | 3/9 Design control — primary reference Westinghouse Electric Corp Control Business Unit |
| 40J278PC22 | 5/2 Secondary reference U.S. Government activity |
| S6100-440433PC22 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-337-7129 is a Seat,valve, manufactured by Westinghouse Electric Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-337-7129 has 2 manufacturer part numbers on file: 1429338 (Westinghouse Electric Corp), 17E637PC22 (Westinghouse Electric Corp).
Key specifications for 1429338: Flange Seat to Disk End Height: 0.375 INCHES NOMINAL IN; Flange Diameter: 2.584 INCHES MINIMUM AND 2.604 INCHES MAXIMUM IN; Body Outside Diameter: 2.129 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN; Style Designator: PLAIN FLANGED. 8 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.