The Valve,check, cataloged under National Stock Number 4820-01-181-8634, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Woodward, Inc. Div Woodward Industrial Control Systems. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-181-8634 |
| Primary Part Number | 5261-041 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Woodward, Inc. Div Woodward Industrial Control Systems |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Material | STEEL BODY |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5261-041 PRIMARY | Woodward, Inc. Div Woodward Industrial Control Systems (USA) |
| Reference | Meaning |
|---|---|
| 5261-041 | 5/9 Secondary reference Woodward, Inc. |
NSN 4820-01-181-8634 is a Valve,check, manufactured by Woodward, Inc. Div Woodward Industrial Control Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-181-8634 has 1 manufacturer part number on file: 5261-041 (Woodward, Inc. Div Woodward Industrial Control Systems).
Key specifications for 5261-041: Style Designator: STRAIGHT THRU; Material: STEEL BODY; Valve Operation Method: AUTOMATIC. 3 specifications are 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.
NSN 4820-01-181-8634 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.