The Disk,valve, cataloged under National Stock Number 4820-01-121-0581, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-121-0581 |
| Primary Part Number | C412-0-B12 ITEM 19 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Shank Diameter | 0.756 INCHES NOMINAL IN |
| Flange Diameter | 0.756 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Seat Angle | 30.0 DEGREES NOMINAL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| C412-0-B12 ITEM 19 PRIMARY | Hunt Valve Company, Inc. (USA) |
| 400452 | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| C412-0-B12 | D/9 Drawing number reference only Hunt Valve Company, Inc. |
NSN 4820-01-121-0581 is a Disk,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-121-0581 has 2 manufacturer part numbers on file: C412-0-B12 ITEM 19 (Hunt Valve Company, Inc.), 400452 (Hunt Valve Company, Inc.).
Key specifications for C412-0-B12 ITEM 19: Shank Diameter: 0.756 INCHES NOMINAL IN; Flange Diameter: 0.756 INCHES NOMINAL IN; Overall Height: 0.545 INCHES NOMINAL IN; Style Designator: POPPET. 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.