The Seat,valve, cataloged under National Stock Number 4820-01-290-4469, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tate Andale, Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-290-4469 |
| Primary Part Number | 499515510062999 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tate Andale, Llc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.375 INCHES NOMINAL IN |
| Flange Diameter | 5.875 INCHES NOMINAL IN |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 4.625 INCHES NOMINAL IN |
| Under Flange Height | 0.625 INCHES NOMINAL IN |
| 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 |
|---|---|
| 499515510062999 PRIMARY | Tate Andale, Llc (USA) |
| Reference | Meaning |
|---|---|
| M44-3-258C SH NO 20 | 5/9 Secondary reference Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
| 499505560060449 | 5/9 Secondary reference Tate Andale, Llc |
| M44-3-258C SH NO 20 | 5/9 Secondary reference Avondale Industries Inc Modular Construction Div |
NSN 4820-01-290-4469 is a Seat,valve, manufactured by Tate Andale, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-290-4469 has 1 manufacturer part number on file: 499515510062999 (Tate Andale, Llc).
Key specifications for 499515510062999: Flange Seat to Disk End Height: 0.375 INCHES NOMINAL IN; Flange Diameter: 5.875 INCHES NOMINAL IN; Style Designator: THREADED FLANGED; Body Inside Diameter: 4.625 INCHES NOMINAL IN. 5 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.