The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-155-5900, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-155-5900 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | FLAT |
| Material Thickness | 0.025 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 1.593 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Width | 1.593 INCHES NOMINAL IN |
| Center Hole Diameter | 0.257 INCHES NOMINAL IN |
| Outside Corner Radius | 0.204 INCHES NOMINAL IN |
| Material | RUBBER |
| Hole Diameter | 0.204 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 |
|---|---|
| 246-357 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-155-5900 is a Diaphragm,valve,flat, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-155-5900: Style Designator: FLAT; Overall Length: 2.031 INCHES NOMINAL IN; Overall Width: 2.031 INCHES NOMINAL IN; Material Thickness: 0.025 INCHES NOMINAL IN. 9 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.