The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-331-9978, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Clayton Manufacturing Company. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-331-9978 |
| Primary Part Number | UH7583 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Clayton Manufacturing Company |
| Status | ACTIVE |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| UH7583 PRIMARY | Clayton Manufacturing Company (USA) |
| 3Y2297PC23 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| UH508-1 | 5/9 Secondary reference Clayton Manufacturing Company |
| E1104SH2PC23 | 5/9 Secondary reference Clayton Manufacturing Company |
NSN 4820-00-331-9978 is a Diaphragm,valve,flat, manufactured by Clayton Manufacturing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-331-9978 has 2 manufacturer part numbers on file: UH7583 (Clayton Manufacturing Company), 3Y2297PC23 (Naval Sea Systems Command).
Key specifications for UH7583: Material: RUBBER SYNTHETIC. 1 specification is 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.