The Disk,valve, cataloged under National Stock Number 4820-01-273-1210, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-273-1210 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Outside Diameter | 2.000 INCHES NOMINAL IN |
| Nominal Thread Size | 1.125 INCHES IN |
| Inside Diameter | 0.391 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 16 |
| Material | NICKEL ALLOY 400 |
| Thread Series Designator | UN |
| 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 |
|---|---|
| S4824H3115112 PIECE 12 | 5/2 Secondary reference U.S. Government activity |
| NAP259 PIECE 12 | 5/9 Secondary reference Atlas Valve Co |
| NAP259 | D/9 Drawing number reference only Atlas Valve Co |
| P3658A | 3/9 Design control — primary reference Atlas Valve Co |
NSN 4820-01-273-1210 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-273-1210: Overall Height: 4.844 INCHES NOMINAL IN; Outside Diameter: 2.000 INCHES NOMINAL IN; Nominal Thread Size: 1.125 INCHES IN; Inside Diameter: 0.391 INCHES NOMINAL IN. 6 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.