The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-407-7554, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aquamatic Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-407-7554 |
| Primary Part Number | V42C-0032-00000 |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aquamatic Inc |
| Status | ACTIVE |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 630575 | Zeks Air Drier Corp Sub of Kemp Co (USA) |
| V42C-0032-00000 PRIMARY | Aquamatic Inc (USA) |
| PL 423383-A ITEM 2 | Zeks Air Drier Corp Sub of Kemp Co (USA) |
| Reference | Meaning |
|---|---|
| 421DV4NCSC SPENCER | 5/9 Secondary reference Aquamatic Inc |
NSN 4820-01-407-7554 is a Valve,diaphragm,stop, manufactured by Aquamatic Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-407-7554 has 3 manufacturer part numbers on file: 630575 (Zeks Air Drier Corp Sub of Kemp Co), V42C-0032-00000 (Aquamatic Inc), PL 423383-A ITEM 2 (Zeks Air Drier Corp Sub of Kemp Co).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-521-6622. Verify interchangeability with system specifications before substitution.
Key specifications for V42C-0032-00000: Special Features: VALVE SIZE 1IN.; NORMALLY CLOSED IN; Valve Operation Method: MANUAL. 1 specification is 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.