The Disk,valve, cataloged under National Stock Number 4820-01-206-6221, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-206-6221 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shank Diameter | 2.250 INCHES NOMINAL IN |
| Flange Diameter | 4.250 INCHES NOMINAL IN |
| Shoulder Height | 0.312 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| 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 | Y |
| Reference | Meaning |
|---|---|
| 178195PC#8 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| 178195 | D/9 Drawing number reference only U.S. Government activity |
| 178195PC#8 | 3/9 Design control — primary reference Pima Valve, Llc |
| 178195 PIECE 8 | 5/9 Secondary reference U.S. Government activity |
| 178195 PIECE8 | C/1 Advisory reference — outside the item-of-supply concept Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
NSN 4820-01-206-6221 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 7035-01-305-1950. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-206-6221: Shank Diameter: 2.250 INCHES NOMINAL IN; Flange Diameter: 4.250 INCHES NOMINAL IN; Overall Height: 3.375 INCHES NOMINAL IN; Shoulder Height: 0.312 INCHES NOMINAL IN. 5 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.