The Disk,valve, cataloged under National Stock Number 4820-01-124-5409, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-124-5409 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Pressure Rating | 250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 150.0 FAHRENHEIT NOMINAL DEGF |
| Taper Minor Diameter | 1.450 INCHES NOMINAL IN |
| Style Designator | SOLID WEDGE |
| Taper Major Diameter | 1.994 INCHES NOMINAL IN |
| Seat Angle | 10.0 DEGREES NOMINAL |
| Taper Length | 3.125 INCHES NOMINAL IN |
| Media for Which Designed | GAS OR OIL OR STEAM |
| Material | NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 803-2177917-2-24 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 803-2177917-02-49 | 3/2 Design control — primary reference U.S. Government activity |
| 803-2177917-02-25 | 5/9 Secondary reference U.S. Government activity |
| 803-2177917 | D/9 Drawing number reference only U.S. Government activity |
| 803-2177917-2-25 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-124-5409 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-125-6464. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-124-5409: Overall Height: 3.125 INCHES NOMINAL IN; Pressure Rating: 250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: 150.0 FAHRENHEIT NOMINAL DEGF; Taper Minor Diameter: 1.450 INCHES NOMINAL IN. 9 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.