The Valve Assembly, cataloged under National Stock Number 4820-00-337-5301, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Drs Environmental Systems Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve Assembly |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Drs Environmental Systems Inc (CAGE 5RQL2) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-337-5301 |
| Primary Part Number | K840729 |
| Item Name | Valve Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Drs Environmental Systems Inc |
| 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 |
|---|---|
| K840729 PRIMARY | Drs Environmental Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| K840729 | 3/9 Design control — primary reference Davey Compressor Co Div of Keco Industries Inc |
| 840729 | 5/9 Secondary reference Kidde-Fenwal, Llc |
| 840729 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
NSN 4820-00-337-5301 is a Valve Assembly, manufactured by Drs Environmental Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-337-5301 has 1 manufacturer part number on file: K840729 (Drs Environmental Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 1560-01-102-8257. Verify interchangeability with system specifications before substitution.
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.