The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-446-7818, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Wanner Engineering Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Wanner Engineering Inc (CAGE 59776) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-446-7818 |
| Primary Part Number | D25-021-1017 |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Wanner Engineering 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 |
|---|---|
| D25-021-1017 PRIMARY | Wanner Engineering Inc (USA) |
| D35C2500001 ITEM 44 | Wanner Engineering Inc (USA) |
| Reference | Meaning |
|---|---|
| D35C2500001 | D/9 Drawing number reference only Wanner Engineering Inc |
| D35C2500004 ITEM 40 | C/1 Advisory reference — outside the item-of-supply concept Wanner Engineering Inc |
NSN 4820-01-446-7818 is a Valve,diaphragm,stop, manufactured by Wanner Engineering Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-446-7818 has 2 manufacturer part numbers on file: D25-021-1017 (Wanner Engineering Inc), D35C2500001 ITEM 44 (Wanner Engineering Inc).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-446-7832, 4820-01-446-8090, 4820-01-446-8112. 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.