The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-509-3459, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is E. P. Barrus Limited Div Special Products. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-509-3459 |
| Primary Part Number | 144791 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | E. P. Barrus Limited Div Special Products |
| Status | ACTIVE |
| 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 |
|---|---|
| 144791 | E. P. Barrus Limited Div Special Products (GBR) |
| Reference | Meaning |
|---|---|
| 144791 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-509-3459 is a Diaphragm,valve,flat, manufactured by E. P. Barrus Limited Div Special Products, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-509-3459 has 1 manufacturer part number on file: 144791 (E. P. Barrus Limited Div Special Products).
Key specifications for 144791: Part Name Assigned by Controlling Agency: VALVE DIAPHRAGM; End Item Identification: ENGINE, OUTBOARD, MERCURY MODEL 150. 0 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.