The Disk,valve, cataloged under National Stock Number 4820-00-423-2798, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-423-2798 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Outside Diameter | 1.938 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 1.062 INCHES NOMINAL IN |
| Material | RUBBER |
| 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 |
|---|---|
| 80264PC9 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 81480G | 3/2 Design control — primary reference U.S. Government activity |
| 18426 PART NO. 5 | 5/2 Secondary reference U.S. Government activity |
| 84022PC8 | 5/2 Secondary reference U.S. Government activity |
| 81480 | 5/9 Secondary reference U.S. Government activity |
| 4820PL1257627 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-00-423-2798 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-194-5933, 6730-01-546-7782. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-423-2798: Overall Height: 0.250 INCHES NOMINAL IN; Outside Diameter: 1.938 INCHES NOMINAL IN; Style Designator: PLAIN; Inside Diameter: 1.062 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.