The Disk,valve, cataloged under National Stock Number 4820-01-485-1226, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-485-1226 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shank Diameter | 0.250 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.718 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Tip Diameter | 0.172 INCHES NOMINAL IN |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Under Flange Height | 2.141 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY OXYGEN CLEANING |
| 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 |
|---|---|
| D50668 IT8 ASSY A47419 | 5/1 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| A47419CP | 3/1 Design control — primary reference Naval Inventory Control Point Mechanicsburg |
| D50668 | D/9 Drawing number reference only Hunt Valve Company Inc Dba Union Flonetics |
| A47419 | 5/1 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-485-1226 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-485-1246, 4820-01-485-1806, 4820-01-485-1820. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-485-1226: Shank Diameter: 0.250 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.718 INCHES NOMINAL IN; Overall Height: 2.938 INCHES NOMINAL IN; Style Designator: POPPET. 8 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.