The Seat,valve, cataloged under National Stock Number 4820-00-398-7419, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-398-7419 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.625 INCHES NOMINAL IN |
| Flange Diameter | 3.312 INCHES NOMINAL IN |
| Thread Length | 1.125 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 2.875 INCHES NOMINAL IN |
| Nominal Thread Size | 0.500 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.125 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| 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 |
| Reference | Meaning |
|---|---|
| WBF127X | 5/9 Secondary reference Cooper Industries Industrial Machinery Div |
| WBF127X | 5/9 Secondary reference Cooper Industries Inc Dba Cooper Tools |
| WBF127 | 5/9 Secondary reference Cooper Industries Inc Dba Cooper Tools |
| WBF127 | 3/9 Design control — primary reference Cooper Industries Industrial Machinery Div |
NSN 4820-00-398-7419 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-398-7419: Flange Seat to Disk End Height: 0.625 INCHES NOMINAL IN; Flange Diameter: 3.312 INCHES NOMINAL IN; Thread Length: 1.125 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: THREADED FLANGED. 11 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.