The Disk,valve, cataloged under National Stock Number 4820-01-733-4891, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Alaskan Copper Companies, Inc. Dba Alaskan Copper Works. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Disk,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Alaskan Copper Companies, Inc. Dba Alaskan Copper Works (CAGE 5M429) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-733-4891 |
| Primary Part Number | DWG NO. R-675 REV. 3 ITEM NO. 12 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Alaskan Copper Companies, Inc. Dba Alaskan Copper Works |
| 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 |
|---|---|
| DWG NO. R-675 REV. 3 ITEM NO. 12 PRIMARY | Alaskan Copper Companies, Inc. Dba Alaskan Copper Works (USA) |
| Reference | Meaning |
|---|---|
| R-675/REV 3 | D/9 Drawing number reference only Alaskan Copper Companies, Inc. Dba Alaskan Copper Works |
NSN 4820-01-733-4891 is a Disk,valve, manufactured by Alaskan Copper Companies, Inc. Dba Alaskan Copper Works, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-733-4891 has 1 manufacturer part number on file: DWG NO. R-675 REV. 3 ITEM NO. 12 (Alaskan Copper Companies, Inc. Dba Alaskan Copper Works).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-733-4925, 2040-01-733-5216. 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.