The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-377-7542, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-377-7542 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Pressure Rating | 400.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Outside Diameter | 5.062 INCHES NOMINAL IN |
| Style Designator | FLAT |
| Material Thickness | 0.017 INCHES NOMINAL IN |
| Center Hole Diameter | 0.625 INCHES NOMINAL IN |
| Media for Which Designed | AIR |
| Material | COPPER ALLOY 510 |
| 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 |
|---|---|
| D22319 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| D22319 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| 22319MBC | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| AA-37041-4 ITEM 5 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| 22319MBC | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
| AA-37041-4 ITEM 5 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-377-7542 is a Diaphragm,valve,flat, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-377-7542: Pressure Rating: 400.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Outside Diameter: 5.062 INCHES NOMINAL IN; Style Designator: FLAT; Material Thickness: 0.017 INCHES NOMINAL IN. 7 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.