The Valve,check, cataloged under National Stock Number 4820-01-657-9547, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711); L3 Technologies, Inc. Div L3 Keo (CAGE 34228) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-657-9547 |
| Primary Part Number | 8590952-D1217483 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| 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 |
|---|---|
| 7378017-32 | Naval Sea Systems Command (USA) |
| 7225791-62 | Naval Sea Systems Command (USA) |
| 8590952-D1217483 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| 7377582-62 | Naval Sea Systems Command (USA) |
| KN011622 | L3 Technologies, Inc. Div L3 Keo (USA) |
| 7377688-25 | Naval Sea Systems Command (USA) |
| 7377923-61 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 8590952 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 4820-01-657-9547 is a Valve,check, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-657-9547 has 7 manufacturer part numbers on file: 7378017-32 (Naval Sea Systems Command), 7225791-62 (Naval Sea Systems Command), 8590952-D1217483 (L3 Technologies, Inc. Div L3 Keo), 7377582-62 (Naval Sea Systems Command), KN011622 (L3 Technologies, Inc. Div L3 Keo) and 2 more.
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.