The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-758-5578, 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5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-758-5578 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Outside Diameter | 3.500 INCHES NOMINAL IN |
| Material Thickness | 0.016 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 3.031 INCHES NOMINAL IN |
| Hole Diameter | 0.250 INCHES NOMINAL IN |
| 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 |
|---|---|
| 200 ITEM 3 | C/1 Advisory reference — outside the item-of-supply concept Oil Capital Valve Company Dba Ocv Control Valves Div Ocv Control Valves, Llc |
| 204 | 3/9 Design control — primary reference Oil Capital Valve Company Dba Ocv Control Valves Div Ocv Control Valves, Llc |
NSN 4820-00-758-5578 is a Diaphragm,valve,flat, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-758-5578: Outside Diameter: 3.500 INCHES NOMINAL IN; Material Thickness: 0.016 INCHES NOMINAL IN; Bolt Hole Quantity: 4; Bolt Circle Diameter: 3.031 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.