The Seat,valve, cataloged under National Stock Number 4820-01-499-9867, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-499-9867 |
| Primary Part Number | 845-2109895 PC 21 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | FAUCET |
| Material | PLASTIC ACETAL SEAT |
| 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 |
|---|---|
| 845-2109895 PC 21 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 845-2109895 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2640-742 | D/9 Drawing number reference only U.S. Government activity |
| 2109895 | D/9 Drawing number reference only U.S. Government activity |
| 2642-742-01 | D/9 Drawing number reference only U.S. Government activity |
| 2640-742 ITEM 21 | 5/2 Secondary reference U.S. Government activity |
| 845-4558730 ITEM 20 | 5/9 Secondary reference U.S. Government activity |
| 845-2109895 PC 21 | 5/9 Secondary reference U.S. Government activity |
| 4558730 | D/9 Drawing number reference only U.S. Government activity |
| 2642-742-01 ITEM 20 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-499-9867 is a Seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-499-9867 has 1 manufacturer part number on file: 845-2109895 PC 21 (Naval Sea Systems Command).
Key specifications for 845-2109895 PC 21: Style Designator: FAUCET; End Item Identification: LOS ANGELES CLASS SSN; Material: PLASTIC ACETAL SEAT; Seating Surface Shape: FLAT. 3 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.