The Disk,valve, cataloged under National Stock Number 4820-00-423-3479, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fluid-Air Products Inc. Dba Fluid-Air Products Inc Div Government. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-423-3479 |
| Primary Part Number | 225-25-1 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fluid-Air Products Inc. Dba Fluid-Air Products Inc Div Government |
| Status | ACTIVE |
| Outside Diameter | 1.564 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 0.688 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 225-25-1 PRIMARY | Fluid-Air Products Inc. Dba Fluid-Air Products Inc Div Government (USA) |
| Reference | Meaning |
|---|---|
| 225-25-1-K5 | 5/9 Secondary reference Illinois Tool Works Inc. |
| 225-25-1KS | 5/9 Secondary reference Illinois Tool Works Inc. |
| 225-25-1 | 5/9 Secondary reference Illinois Tool Works Inc. |
NSN 4820-00-423-3479 is a Disk,valve, manufactured by Fluid-Air Products Inc. Dba Fluid-Air Products Inc Div Government, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-423-3479 has 1 manufacturer part number on file: 225-25-1 (Fluid-Air Products Inc. Dba Fluid-Air Products Inc Div Government).
1 possible match (shared part number, not a government interchangeability claim): 6210-00-729-9394. Verify interchangeability with system specifications before substitution.
Key specifications for 225-25-1: Overall Height: 0.025 INCHES NOMINAL IN; Outside Diameter: 1.564 INCHES NOMINAL IN; Style Designator: PLAIN; Inside Diameter: 0.688 INCHES NOMINAL IN. 4 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.
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.