The Seat,valve, cataloged under National Stock Number 4820-00-083-2886, 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 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-083-2886 |
| Primary Part Number | 1JH1521 PIECE 7 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.500 INCHES NOMINAL IN |
| Flange Diameter | 1.595 INCHES MINIMUM AND 1.605 INCHES MAXIMUM IN |
| Body Outside Diameter | 1.002 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN |
| Seal Accommodation Type | GROOVED |
| Taper Minor Diameter | 0.438 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | MTL-9211 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Taper Major Diameter | 0.609 INCHES NOMINAL IN |
| Body Inside Diameter | 0.438 INCHES NOMINAL IN |
| Seat Radius | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Under Flange Height | 0.625 INCHES NOMINAL IN |
| Material | CHROMIUM ALLOY OVERALL |
| 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 |
|---|---|
| 1JH1521 PIECE 7 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 1505012 | 3/2 Design control — primary reference U.S. Government activity |
| 1505012 | 5/9 Secondary reference Westinghouse Electric Corp |
NSN 4820-00-083-2886 is a Seat,valve, manufactured by Westinghouse Electric Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-083-2886 has 1 manufacturer part number on file: 1JH1521 PIECE 7 (Westinghouse Electric Corp).
Key specifications for 1JH1521 PIECE 7: Flange Seat to Disk End Height: 0.500 INCHES NOMINAL IN; Flange Diameter: 1.595 INCHES MINIMUM AND 1.605 INCHES MAXIMUM IN; Body Outside Diameter: 1.002 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN; Seal Accommodation Type: GROOVED. 13 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.