The Valve,check, cataloged under National Stock Number 4820-01-689-3379, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Stauffer Diesel, Inc. Dba Stauffer Diesel Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Stauffer Diesel, Inc. Dba Stauffer Diesel Inc (CAGE 4K637) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-689-3379 |
| Primary Part Number | 56596 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Stauffer Diesel, Inc. Dba Stauffer Diesel 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 |
|---|---|
| 56596 PRIMARY | Stauffer Diesel, Inc. Dba Stauffer Diesel Inc (USA) |
| Reference | Meaning |
|---|---|
| 31000-506 | 3/1 Design control — primary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4820-01-689-3379 is a Valve,check, manufactured by Stauffer Diesel, Inc. Dba Stauffer Diesel Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-689-3379 has 1 manufacturer part number on file: 56596 (Stauffer Diesel, Inc. Dba Stauffer Diesel Inc).
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.